51970394 has 16 divisors (see below), whose sum is σ = 94333248. Its totient is φ = 20962752.

The previous prime is 51970333. The next prime is 51970439. The reversal of 51970394 is 49307915.

51970394 = 63² + 64² + ... + 538².

It is a happy number.

It is a Curzon number.

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, 108944 + ... + 109419.

It is an arithmetic number, because the mean of its divisors is an integer number (5895828).

Almost surely, 2^51970394 is an apocalyptic number.

51970394 is a deficient number, since it is larger than the sum of its proper divisors (42362854).

51970394 is a wasteful number, since it uses less digits than its factorization.

51970394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218389.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 51970394 is about 7209.0494519042. The cubic root of 51970394 is about 373.1802658716.

The spelling of 51970394 in words is "fifty-one million, nine hundred seventy thousand, three hundred ninety-four".