100242531 has 24 divisors (see below), whose sum is σ = 150302880. Its totient is φ = 64302336.

The previous prime is 100242529. The next prime is 100242539. The reversal of 100242531 is 135242001.

It is not a de Polignac number, because 100242531 - 2¹ = 100242529 is a prime.

It is a super-2 number, since 2×100242531² = 20097130042571922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100242539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112570 + ... + 113456.

It is an arithmetic number, because the mean of its divisors is an integer number (6262620).

Almost surely, 2^100242531 is an apocalyptic number.

100242531 is a deficient number, since it is larger than the sum of its proper divisors (50060349).

100242531 is a wasteful number, since it uses less digits than its factorization.

100242531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 100242531 is about 10012.1192062420. The cubic root of 100242531 is about 464.5338234696.

Adding to 100242531 its reverse (135242001), we get a palindrome (235484532).

The spelling of 100242531 in words is "one hundred million, two hundred forty-two thousand, five hundred thirty-one".