51161157 has 12 divisors (see below), whose sum is σ = 74081280. Its totient is φ = 34023528.

The previous prime is 51161141. The next prime is 51161207. The reversal of 51161157 is 75116115.

It is a happy number.

It is not a de Polignac number, because 51161157 - 2⁴ = 51161141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51161157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51161107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3013 + ... + 10554.

It is an arithmetic number, because the mean of its divisors is an integer number (6173440).

Almost surely, 2^51161157 is an apocalyptic number.

It is an amenable number.

51161157 is a deficient number, since it is larger than the sum of its proper divisors (22920123).

51161157 is a wasteful number, since it uses less digits than its factorization.

51161157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13992 (or 13989 counting only the distinct ones).

The product of its digits is 1050, while the sum is 27.

The square root of 51161157 is about 7152.7027758743. The cubic root of 51161157 is about 371.2331802059.

The spelling of 51161157 in words is "fifty-one million, one hundred sixty-one thousand, one hundred fifty-seven".