102506531 has 2 divisors, whose sum is σ = 102506532. Its totient is φ = 102506530.

The previous prime is 102506507. The next prime is 102506567. The reversal of 102506531 is 135605201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102506531 is a prime.

It is a super-2 number, since 2×102506531² = 21015177795307922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102506497 and 102506506.

It is not a weakly prime, because it can be changed into another prime (102506231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51253265 + 51253266.

It is an arithmetic number, because the mean of its divisors is an integer number (51253266).

Almost surely, 2^102506531 is an apocalyptic number.

102506531 is a deficient number, since it is larger than the sum of its proper divisors (1).

102506531 is an equidigital number, since it uses as much as digits as its factorization.

102506531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 102506531 is about 10124.5509036204. The cubic root of 102506531 is about 468.0050207049.

The spelling of 102506531 in words is "one hundred two million, five hundred six thousand, five hundred thirty-one".