102520531 has 2 divisors, whose sum is σ = 102520532. Its totient is φ = 102520530.

The previous prime is 102520511. The next prime is 102520547. The reversal of 102520531 is 135025201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102520531 - 2⁷ = 102520403 is a prime.

It is a super-2 number, since 2×102520531² = 21020918553043922, 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 = 102520499 and 102520508.

It is not a weakly prime, because it can be changed into another prime (102520511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51260265 + 51260266.

It is an arithmetic number, because the mean of its divisors is an integer number (51260266).

Almost surely, 2^102520531 is an apocalyptic number.

102520531 is a deficient number, since it is larger than the sum of its proper divisors (1).

102520531 is an equidigital number, since it uses as much as digits as its factorization.

102520531 is an evil number, because the sum of its binary digits is even.

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

The square root of 102520531 is about 10125.2422687065. The cubic root of 102520531 is about 468.0263259231.

Adding to 102520531 its reverse (135025201), we get a palindrome (237545732).

The spelling of 102520531 in words is "one hundred two million, five hundred twenty thousand, five hundred thirty-one".