915020100 has 54 divisors (see below), whose sum is σ = 2868082490. Its totient is φ = 244005120.

The previous prime is 915020089. The next prime is 915020129. The reversal of 915020100 is 1020519.

It can be written as a sum of positive squares in 3 ways, for example, as 307791936 + 607228164 = 17544^2 + 24642^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 507445 + ... + 509244.

Almost surely, 2^915020100 is an apocalyptic number.

915020100 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

915020100 is an abundant number, since it is smaller than the sum of its proper divisors (1953062390).

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

915020100 is a wasteful number, since it uses less digits than its factorization.

915020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016709 (or 1016699 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 915020100 is about 30249.2991654352. The cubic root of 915020100 is about 970.8307970650.

Adding to 915020100 its reverse (1020519), we get a palindrome (916040619).

The spelling of 915020100 in words is "nine hundred fifteen million, twenty thousand, one hundred".