51342864 has 60 divisors (see below), whose sum is σ = 140031216. Its totient is φ = 16208064.

The previous prime is 51342853. The next prime is 51342911. The reversal of 51342864 is 46824315.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15847 + ... + 18809.

Almost surely, 2^51342864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51342864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70015608).

51342864 is an abundant number, since it is smaller than the sum of its proper divisors (88688352).

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

51342864 is a wasteful number, since it uses less digits than its factorization.

51342864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012 (or 2987 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 51342864 is about 7165.3934993132. The cubic root of 51342864 is about 371.6721588424.

The spelling of 51342864 in words is "fifty-one million, three hundred forty-two thousand, eight hundred sixty-four".