102031240520 has 32 divisors (see below), whose sum is σ = 250440318720. Its totient is φ = 37102269120.

The previous prime is 102031240513. The next prime is 102031240559. The reversal of 102031240520 is 25042130201.

It is a super-3 number, since 3×102031240520³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 102031240492 and 102031240501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115944152 + ... + 115945031.

It is an arithmetic number, because the mean of its divisors is an integer number (7826259960).

Almost surely, 2^102031240520 is an apocalyptic number.

102031240520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102031240520 is an abundant number, since it is smaller than the sum of its proper divisors (148409078200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102031240520 is a wasteful number, since it uses less digits than its factorization.

102031240520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231889205 (or 231889201 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 102031240520 its reverse (25042130201), we get a palindrome (127073370721).

The spelling of 102031240520 in words is "one hundred two billion, thirty-one million, two hundred forty thousand, five hundred twenty".