225615801900 has 72 divisors (see below), whose sum is σ = 652911839440. Its totient is φ = 60152221440.

The previous prime is 225615801881. The next prime is 225615801907. The reversal of 225615801900 is 9108516522.

It is a super-2 number, since 2×225615801900² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (225615801907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1486746 + ... + 1631454.

Almost surely, 2^225615801900 is an apocalyptic number.

225615801900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225615801900 is an abundant number, since it is smaller than the sum of its proper divisors (427296037540).

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

225615801900 is a wasteful number, since it uses less digits than its factorization.

225615801900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149923 (or 149916 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 225615801900 in words is "two hundred twenty-five billion, six hundred fifteen million, eight hundred one thousand, nine hundred".