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1401322431 = 39715131891
BaseRepresentation
bin101001110000110…
…0111101110111111
310121122211112222210
41103201213232333
510332214304211
6351015111503
746504021065
oct12341475677
93548745883
101401322431
1165a012313
12331372593
13194422692
14d4178035
15830569a6
hex53867bbf

1401322431 has 16 divisors (see below), whose sum is σ = 1900252928. Its totient is φ = 918432000.

The previous prime is 1401322387. The next prime is 1401322457. The reversal of 1401322431 is 1342231041.

It is not a de Polignac number, because 1401322431 - 26 = 1401322367 is a prime.

It is a super-2 number, since 2×14013224312 = 3927409111247499522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401322398 and 1401322407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401322031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27996 + ... + 59886.

It is an arithmetic number, because the mean of its divisors is an integer number (118765808).

Almost surely, 21401322431 is an apocalyptic number.

1401322431 is a deficient number, since it is larger than the sum of its proper divisors (498930497).

1401322431 is a wasteful number, since it uses less digits than its factorization.

1401322431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32142.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1401322431 is about 37434.2414241293. The cubic root of 1401322431 is about 1119.0410666941.

Adding to 1401322431 its reverse (1342231041), we get a palindrome (2743553472).

The spelling of 1401322431 in words is "one billion, four hundred one million, three hundred twenty-two thousand, four hundred thirty-one".

Divisors: 1 3 97 151 291 453 14647 31891 43941 95673 3093427 4815541 9280281 14446623 467107477 1401322431