51672618 has 12 divisors (see below), whose sum is σ = 111957378. Its totient is φ = 17224200.

The previous prime is 51672589. The next prime is 51672619. The reversal of 51672618 is 81627615.

It can be written as a sum of positive squares in only one way, i.e., 49322529 + 2350089 = 7023^2 + 1533^2 .

It is not an unprimeable number, because it can be changed into a prime (51672619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1435333 + ... + 1435368.

Almost surely, 2^51672618 is an apocalyptic number.

51672618 is an abundant number, since it is smaller than the sum of its proper divisors (60284760).

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

51672618 is a wasteful number, since it uses less digits than its factorization.

51672618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870709 (or 2870706 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 51672618 is about 7188.3668520743. The cubic root of 51672618 is about 372.4661603120.

The spelling of 51672618 in words is "fifty-one million, six hundred seventy-two thousand, six hundred eighteen".