100252531 has 4 divisors (see below), whose sum is σ = 105529000. Its totient is φ = 94976064.

The previous prime is 100252517. The next prime is 100252541. The reversal of 100252531 is 135252001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135252001 = 881 ⋅153521.

It is a cyclic number.

It is not a de Polignac number, because 100252531 - 2¹⁹ = 99728243 is a prime.

It is a super-2 number, since 2×100252531² = 20101139943811922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 5276449 = 100252531 / (1 + 0 + 0 + 2 + 5 + 2 + 5 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100252499 and 100252508.

It is not an unprimeable number, because it can be changed into a prime (100252511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2638206 + ... + 2638243.

It is an arithmetic number, because the mean of its divisors is an integer number (26382250).

Almost surely, 2^100252531 is an apocalyptic number.

100252531 is a deficient number, since it is larger than the sum of its proper divisors (5276469).

100252531 is an equidigital number, since it uses as much as digits as its factorization.

100252531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276468.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 100252531 is about 10012.6185885611. The cubic root of 100252531 is about 464.5492699530.

The spelling of 100252531 in words is "one hundred million, two hundred fifty-two thousand, five hundred thirty-one".