51892013 has 4 divisors (see below), whose sum is σ = 53098848. Its totient is φ = 50685180.

The previous prime is 51892003. The next prime is 51892031. The reversal of 51892013 is 31029815.

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.

It is a cyclic number.

It is not a de Polignac number, because 51892013 - 2⁸ = 51891757 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 (51892003) 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, 603353 + ... + 603438.

It is an arithmetic number, because the mean of its divisors is an integer number (13274712).

Almost surely, 2^51892013 is an apocalyptic number.

It is an amenable number.

51892013 is a deficient number, since it is larger than the sum of its proper divisors (1206835).

51892013 is a wasteful number, since it uses less digits than its factorization.

51892013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206834.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 51892013 is about 7203.6111083262. The cubic root of 51892013 is about 372.9925631084.

The spelling of 51892013 in words is "fifty-one million, eight hundred ninety-two thousand, thirteen".