16315554225 has 24 divisors (see below), whose sum is σ = 27704109760. Its totient is φ = 8466448320.

The previous prime is 16315554191. The next prime is 16315554257. The reversal of 16315554225 is 52245551361.

It is not a de Polignac number, because 16315554225 - 2²² = 16311359921 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2936965 + ... + 2942514.

Almost surely, 2^16315554225 is an apocalyptic number.

16315554225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16315554225 is a deficient number, since it is larger than the sum of its proper divisors (11388555535).

16315554225 is a wasteful number, since it uses less digits than its factorization.

16315554225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879529 (or 5879524 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The spelling of 16315554225 in words is "sixteen billion, three hundred fifteen million, five hundred fifty-four thousand, two hundred twenty-five".