15625051 has 8 divisors (see below), whose sum is σ = 17001824. Its totient is φ = 14273280.

The previous prime is 15625031. The next prime is 15625061. The reversal of 15625051 is 15052651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15625051 - 2⁵ = 15625019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15625031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4935 + ... + 7456.

It is an arithmetic number, because the mean of its divisors is an integer number (2125228).

Almost surely, 2^15625051 is an apocalyptic number.

15625051 is a deficient number, since it is larger than the sum of its proper divisors (1376773).

15625051 is a wasteful number, since it uses less digits than its factorization.

15625051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12501.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 15625051 is about 3952.8535262516. The cubic root of 15625051 is about 250.0002719997. Note that the first 3 decimals are identical.

The spelling of 15625051 in words is "fifteen million, six hundred twenty-five thousand, fifty-one".