51331306 has 16 divisors (see below), whose sum is σ = 83145384. Its totient is φ = 23626944.

The previous prime is 51331253. The next prime is 51331327. The reversal of 51331306 is 60313315.

It can be written as a sum of positive squares in 4 ways, for example, as 42575625 + 8755681 = 6525^2 + 2959^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7836 + ... + 12808.

Almost surely, 2^51331306 is an apocalyptic number.

51331306 is a deficient number, since it is larger than the sum of its proper divisors (31814078).

51331306 is a wasteful number, since it uses less digits than its factorization.

51331306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5385.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 51331306 is about 7164.5869385471. The cubic root of 51331306 is about 371.6442672079.

Subtracting 51331306 from its reverse (60313315), we obtain a square (8982009 = 2997²).

The spelling of 51331306 in words is "fifty-one million, three hundred thirty-one thousand, three hundred six".