51474013 has 4 divisors (see below), whose sum is σ = 51512668. Its totient is φ = 51435360.

The previous prime is 51474001. The next prime is 51474029. The reversal of 51474013 is 31047415.

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 31787044 + 19686969 = 5638^2 + 4437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51474013 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 (51474613) 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, 17256 + ... + 20017.

It is an arithmetic number, because the mean of its divisors is an integer number (12878167).

Almost surely, 2^51474013 is an apocalyptic number.

It is an amenable number.

51474013 is a deficient number, since it is larger than the sum of its proper divisors (38655).

51474013 is a wasteful number, since it uses less digits than its factorization.

51474013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38654.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 51474013 is about 7174.5392186537. The cubic root of 51474013 is about 371.9883532986.

The spelling of 51474013 in words is "fifty-one million, four hundred seventy-four thousand, thirteen".