51357291 has 4 divisors (see below), whose sum is σ = 68476392. Its totient is φ = 34238192.

The previous prime is 51357281. The next prime is 51357301. The reversal of 51357291 is 19275315.

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

It is an interprime number because it is at equal distance from previous prime (51357281) and next prime (51357301).

It is a cyclic number.

It is not a de Polignac number, because 51357291 - 2⁶ = 51357227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51357281) 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, 8559546 + ... + 8559551.

It is an arithmetic number, because the mean of its divisors is an integer number (17119098).

Almost surely, 2^51357291 is an apocalyptic number.

51357291 is a deficient number, since it is larger than the sum of its proper divisors (17119101).

51357291 is a wasteful number, since it uses less digits than its factorization.

51357291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17119100.

The product of its digits is 9450, while the sum is 33.

The square root of 51357291 is about 7166.4001423309. The cubic root of 51357291 is about 371.7069680425.

The spelling of 51357291 in words is "fifty-one million, three hundred fifty-seven thousand, two hundred ninety-one".