51157011 has 4 divisors (see below), whose sum is σ = 68209352. Its totient is φ = 34104672.

The previous prime is 51156983. The next prime is 51157019. The reversal of 51157011 is 11075115.

It is a happy number.

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

It is not a de Polignac number, because 51157011 - 2⁷ = 51156883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51157019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8526166 + ... + 8526171.

It is an arithmetic number, because the mean of its divisors is an integer number (17052338).

Almost surely, 2^51157011 is an apocalyptic number.

51157011 is a deficient number, since it is larger than the sum of its proper divisors (17052341).

51157011 is a wasteful number, since it uses less digits than its factorization.

51157011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17052340.

The product of its (nonzero) digits is 175, while the sum is 21.

The square root of 51157011 is about 7152.4129494877. The cubic root of 51157011 is about 371.2231519316.

The spelling of 51157011 in words is "fifty-one million, one hundred fifty-seven thousand, eleven".