51157954 has 4 divisors (see below), whose sum is σ = 76736934. Its totient is φ = 25578976.

The previous prime is 51157933. The next prime is 51157961. The reversal of 51157954 is 45975115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 106929 = 7145^2 + 327^2 .

It is a super-2 number, since 2×51157954² = 5234272514932232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12789487 + ... + 12789490.

Almost surely, 2^51157954 is an apocalyptic number.

51157954 is a deficient number, since it is larger than the sum of its proper divisors (25578980).

51157954 is a wasteful number, since it uses less digits than its factorization.

51157954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25578979.

The product of its digits is 31500, while the sum is 37.

The square root of 51157954 is about 7152.4788709929. The cubic root of 51157954 is about 371.2254328916.

It can be divided in two parts, 5115 and 7954, that multiplied together give a triangular number (40684710 = T₉₀₂₀).

The spelling of 51157954 in words is "fifty-one million, one hundred fifty-seven thousand, nine hundred fifty-four".