51679018 has 4 divisors (see below), whose sum is σ = 77518530. Its totient is φ = 25839508.

The previous prime is 51678989. The next prime is 51679021. The reversal of 51679018 is 81097615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81097615 = 5 ⋅16219523.

It can be written as a sum of positive squares in only one way, i.e., 42419169 + 9259849 = 6513^2 + 3043^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12919753 + ... + 12919756.

Almost surely, 2^51679018 is an apocalyptic number.

51679018 is a deficient number, since it is larger than the sum of its proper divisors (25839512).

51679018 is a wasteful number, since it uses less digits than its factorization.

51679018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25839511.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 51679018 is about 7188.8120019931. The cubic root of 51679018 is about 372.4815371538.

The spelling of 51679018 in words is "fifty-one million, six hundred seventy-nine thousand, eighteen".