51157534 has 4 divisors (see below), whose sum is σ = 76736304. Its totient is φ = 25578766.

The previous prime is 51157529. The next prime is 51157549. The reversal of 51157534 is 43575115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43575115 = 5 ⋅8715023.

It is a super-2 number, since 2×51157534² = 5234186569922312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51157496 and 51157505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12789382 + ... + 12789385.

It is an arithmetic number, because the mean of its divisors is an integer number (19184076).

Almost surely, 2^51157534 is an apocalyptic number.

51157534 is a deficient number, since it is larger than the sum of its proper divisors (25578770).

51157534 is a wasteful number, since it uses less digits than its factorization.

51157534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25578769.

The product of its digits is 10500, while the sum is 31.

The square root of 51157534 is about 7152.4495104824. The cubic root of 51157534 is about 371.2244169850.

The spelling of 51157534 in words is "fifty-one million, one hundred fifty-seven thousand, five hundred thirty-four".