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531072103 = 1301408203
BaseRepresentation
bin11111101001111…
…000010001100111
31101000022020222011
4133221320101213
52041423301403
6124410415051
716106016112
oct3751702147
91330266864
10531072103
1125285a371
12129a31487
1386044063
1450763579
1531954a6d
hex1fa78467

531072103 has 4 divisors (see below), whose sum is σ = 531481608. Its totient is φ = 530662600.

The previous prime is 531072071. The next prime is 531072107. The reversal of 531072103 is 301270135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301270135 = 560254027.

It is a cyclic number.

It is not a de Polignac number, because 531072103 - 25 = 531072071 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531072107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202801 + ... + 205402.

It is an arithmetic number, because the mean of its divisors is an integer number (132870402).

Almost surely, 2531072103 is an apocalyptic number.

531072103 is a deficient number, since it is larger than the sum of its proper divisors (409505).

531072103 is a wasteful number, since it uses less digits than its factorization.

531072103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409504.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 531072103 is about 23045.0016923410. The cubic root of 531072103 is about 809.8125375253.

The spelling of 531072103 in words is "five hundred thirty-one million, seventy-two thousand, one hundred three".

Divisors: 1 1301 408203 531072103