102520031 has 4 divisors (see below), whose sum is σ = 102551952. Its totient is φ = 102488112.

The previous prime is 102520027. The next prime is 102520063. The reversal of 102520031 is 130025201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130025201 = 6361 ⋅20441.

It is a cyclic number.

It is not a de Polignac number, because 102520031 - 2² = 102520027 is a prime.

It is a super-2 number, since 2×102520031² = 21020713512481922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102519988 and 102520015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102520021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10526 + ... + 17771.

It is an arithmetic number, because the mean of its divisors is an integer number (25637988).

Almost surely, 2^102520031 is an apocalyptic number.

102520031 is a deficient number, since it is larger than the sum of its proper divisors (31921).

102520031 is an equidigital number, since it uses as much as digits as its factorization.

102520031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31920.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 102520031 is about 10125.2175779091. The cubic root of 102520031 is about 468.0255650558.

Adding to 102520031 its reverse (130025201), we get a palindrome (232545232).

The spelling of 102520031 in words is "one hundred two million, five hundred twenty thousand, thirty-one".