51397954 has 8 divisors (see below), whose sum is σ = 77543100. Its totient is φ = 25550256.

The previous prime is 51397949. The next prime is 51397961. The reversal of 51397954 is 45979315.

It can be written as a sum of positive squares in 2 ways, for example, as 35676729 + 15721225 = 5973^2 + 3965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51397954² = 5283499350772232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51397954.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73929 + ... + 74620.

Almost surely, 2^51397954 is an apocalyptic number.

51397954 is a deficient number, since it is larger than the sum of its proper divisors (26145146).

51397954 is a wasteful number, since it uses less digits than its factorization.

51397954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148724.

The product of its digits is 170100, while the sum is 43.

The square root of 51397954 is about 7169.2366399778. The cubic root of 51397954 is about 371.8050439131.

The spelling of 51397954 in words is "fifty-one million, three hundred ninety-seven thousand, nine hundred fifty-four".