102001531 has 2 divisors, whose sum is σ = 102001532. Its totient is φ = 102001530.

The previous prime is 102001517. The next prime is 102001541. The reversal of 102001531 is 135100201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102001531 - 2⁵ = 102001499 is a prime.

It is a super-2 number, since 2×102001531² = 20808624652687922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102001541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000765 + 51000766.

It is an arithmetic number, because the mean of its divisors is an integer number (51000766).

Almost surely, 2^102001531 is an apocalyptic number.

102001531 is a deficient number, since it is larger than the sum of its proper divisors (1).

102001531 is an equidigital number, since it uses as much as digits as its factorization.

102001531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 102001531 is about 10099.5807338721. The cubic root of 102001531 is about 467.2352105151.

Adding to 102001531 its reverse (135100201), we get a palindrome (237101732).

The spelling of 102001531 in words is "one hundred two million, one thousand, five hundred thirty-one".