51074213 has 4 divisors (see below), whose sum is σ = 51133068. Its totient is φ = 51015360.

The previous prime is 51074207. The next prime is 51074251. The reversal of 51074213 is 31247015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31247015 = 5 ⋅6249403.

It can be written as a sum of positive squares in 2 ways, for example, as 7606564 + 43467649 = 2758^2 + 6593^2 .

It is a cyclic number.

It is not a de Polignac number, because 51074213 - 2⁴ = 51074197 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 (51074113) 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, 28106 + ... + 29867.

It is an arithmetic number, because the mean of its divisors is an integer number (12783267).

Almost surely, 2^51074213 is an apocalyptic number.

It is an amenable number.

51074213 is a deficient number, since it is larger than the sum of its proper divisors (58855).

51074213 is an equidigital number, since it uses as much as digits as its factorization.

51074213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58854.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51074213 is about 7146.6224889804. The cubic root of 51074213 is about 371.0227679810.

The spelling of 51074213 in words is "fifty-one million, seventy-four thousand, two hundred thirteen".