51133157 has 4 divisors (see below), whose sum is σ = 51225516. Its totient is φ = 51040800.

The previous prime is 51133111. The next prime is 51133171. The reversal of 51133157 is 75133115.

51133157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12208036 + 38925121 = 3494^2 + 6239^2 .

It is a cyclic number.

It is not a de Polignac number, because 51133157 - 2¹⁸ = 50871013 is a prime.

It is a super-2 number, since 2×51133157² = 5229199489573298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51133457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45344 + ... + 46457.

It is an arithmetic number, because the mean of its divisors is an integer number (12806379).

Almost surely, 2^51133157 is an apocalyptic number.

It is an amenable number.

51133157 is a deficient number, since it is larger than the sum of its proper divisors (92359).

51133157 is an equidigital number, since it uses as much as digits as its factorization.

51133157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92358.

The product of its digits is 1575, while the sum is 26.

The square root of 51133157 is about 7150.7452059208. The cubic root of 51133157 is about 371.1654437531.

The spelling of 51133157 in words is "fifty-one million, one hundred thirty-three thousand, one hundred fifty-seven".