51058213 has 4 divisors (see below), whose sum is σ = 51108768. Its totient is φ = 51007660.

The previous prime is 51058193. The next prime is 51058247. The reversal of 51058213 is 31285015.

It is a happy number.

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 51058213 - 2⁹ = 51057701 is a prime.

It is a super-2 number, since 2×51058213² = 5213882229506738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51058013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23731 + ... + 25792.

It is an arithmetic number, because the mean of its divisors is an integer number (12777192).

Almost surely, 2^51058213 is an apocalyptic number.

It is an amenable number.

51058213 is a deficient number, since it is larger than the sum of its proper divisors (50555).

51058213 is a wasteful number, since it uses less digits than its factorization.

51058213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50554.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 51058213 is about 7145.5029913926. The cubic root of 51058213 is about 370.9840205457.

The spelling of 51058213 in words is "fifty-one million, fifty-eight thousand, two hundred thirteen".