253305721100 has 18 divisors (see below), whose sum is σ = 549673415004. Its totient is φ = 101322288400.

The previous prime is 253305721093. The next prime is 253305721111. The reversal of 253305721100 is 1127503352.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1266528506 + ... + 1266528705.

Almost surely, 2^253305721100 is an apocalyptic number.

253305721100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253305721100 is an abundant number, since it is smaller than the sum of its proper divisors (296367693904).

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

253305721100 is a wasteful number, since it uses less digits than its factorization.

253305721100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533057225 (or 2533057218 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The spelling of 253305721100 in words is "two hundred fifty-three billion, three hundred five million, seven hundred twenty-one thousand, one hundred".