51285704 has 8 divisors (see below), whose sum is σ = 96160710. Its totient is φ = 25642848.

The previous prime is 51285701. The next prime is 51285721. The reversal of 51285704 is 40758215.

It can be written as a sum of positive squares in only one way, i.e., 47637604 + 3648100 = 6902^2 + 1910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51285701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205349 + ... + 3205364.

Almost surely, 2^51285704 is an apocalyptic number.

It is an amenable number.

51285704 is a deficient number, since it is larger than the sum of its proper divisors (44875006).

51285704 is a wasteful number, since it uses less digits than its factorization.

51285704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410719 (or 6410715 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 51285704 is about 7161.4037730043. The cubic root of 51285704 is about 371.5341801130.

The spelling of 51285704 in words is "fifty-one million, two hundred eighty-five thousand, seven hundred four".