51699366 has 12 divisors (see below), whose sum is σ = 112015332. Its totient is φ = 17233116.

The previous prime is 51699353. The next prime is 51699371. The reversal of 51699366 is 66399615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1436076 + ... + 1436111.

It is an arithmetic number, because the mean of its divisors is an integer number (9334611).

Almost surely, 2^51699366 is an apocalyptic number.

51699366 is an abundant number, since it is smaller than the sum of its proper divisors (60315966).

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

51699366 is a wasteful number, since it uses less digits than its factorization.

51699366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872195 (or 2872192 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 51699366 is about 7190.2271174143. The cubic root of 51699366 is about 372.5304174672.

It can be divided in two parts, 5169 and 9366, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 51699366 in words is "fifty-one million, six hundred ninety-nine thousand, three hundred sixty-six".