51357013 has 4 divisors (see below), whose sum is σ = 51375040. Its totient is φ = 51338988.

The previous prime is 51357011. The next prime is 51357043. The reversal of 51357013 is 31075315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31075315 = 5 ⋅6215063.

It is a cyclic number.

It is not a de Polignac number, because 51357013 - 2¹ = 51357011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51357011) 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, 3693 + ... + 10786.

It is an arithmetic number, because the mean of its divisors is an integer number (12843760).

Almost surely, 2^51357013 is an apocalyptic number.

It is an amenable number.

51357013 is a deficient number, since it is larger than the sum of its proper divisors (18027).

51357013 is a wasteful number, since it uses less digits than its factorization.

51357013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18026.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 51357013 is about 7166.3807462345. The cubic root of 51357013 is about 371.7062973508.

The spelling of 51357013 in words is "fifty-one million, three hundred fifty-seven thousand, thirteen".