51615874 has 16 divisors (see below), whose sum is σ = 78744960. Its totient is φ = 25370800.

The previous prime is 51615871. The next prime is 51615881. The reversal of 51615874 is 47851615.

It is not an unprimeable number, because it can be changed into a prime (51615871) 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, 39024 + ... + 40324.

It is an arithmetic number, because the mean of its divisors is an integer number (4921560).

Almost surely, 2^51615874 is an apocalyptic number.

51615874 is a deficient number, since it is larger than the sum of its proper divisors (27129086).

51615874 is a wasteful number, since it uses less digits than its factorization.

51615874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625.

The product of its digits is 33600, while the sum is 37.

The square root of 51615874 is about 7184.4188352295. The cubic root of 51615874 is about 372.3297698222.

The spelling of 51615874 in words is "fifty-one million, six hundred fifteen thousand, eight hundred seventy-four".