51157532 has 12 divisors (see below), whose sum is σ = 91945560. Its totient is φ = 24887376.

The previous prime is 51157529. The next prime is 51157549. The reversal of 51157532 is 23575115.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51157495 and 51157504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172682 + ... + 172977.

It is an arithmetic number, because the mean of its divisors is an integer number (7662130).

Almost surely, 2^51157532 is an apocalyptic number.

It is an amenable number.

51157532 is a deficient number, since it is larger than the sum of its proper divisors (40788028).

51157532 is a wasteful number, since it uses less digits than its factorization.

51157532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345700 (or 345698 counting only the distinct ones).

The product of its digits is 5250, while the sum is 29.

The square root of 51157532 is about 7152.4493706702. The cubic root of 51157532 is about 371.2244121473.

The spelling of 51157532 in words is "fifty-one million, one hundred fifty-seven thousand, five hundred thirty-two".