102913220 has 12 divisors (see below), whose sum is σ = 216117804. Its totient is φ = 41165280.

The previous prime is 102913193. The next prime is 102913229. The reversal of 102913220 is 22319201.

It can be written as a sum of positive squares in 2 ways, for example, as 41165056 + 61748164 = 6416^2 + 7858^2 .

It is a super-2 number, since 2×102913220² = 21182261701536800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5145661 = 102913220 / (1 + 0 + 2 + 9 + 1 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 102913192 and 102913201.

It is not an unprimeable number, because it can be changed into a prime (102913229) 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, 2572811 + ... + 2572850.

It is an arithmetic number, because the mean of its divisors is an integer number (18009817).

Almost surely, 2^102913220 is an apocalyptic number.

102913220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102913220 is an abundant number, since it is smaller than the sum of its proper divisors (113204584).

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

102913220 is a wasteful number, since it uses less digits than its factorization.

102913220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145670 (or 5145668 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 102913220 is about 10144.6153204545. The cubic root of 102913220 is about 468.6231320068.

The spelling of 102913220 in words is "one hundred two million, nine hundred thirteen thousand, two hundred twenty".