51890413 has 2 divisors, whose sum is σ = 51890414. Its totient is φ = 51890412.

The previous prime is 51890411. The next prime is 51890417. The reversal of 51890413 is 31409815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51868804 + 21609 = 7202^2 + 147^2 .

It is a cyclic number.

It is not a de Polignac number, because 51890413 - 2¹ = 51890411 is a prime.

It is a super-2 number, since 2×51890413² = 5385229922621138, which contains 22 as substring.

Together with 51890411, it forms a pair of twin primes.

It is the 7204-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51890411) by changing a digit.

It is a nontrivial repunit in base 7203.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25945206 + 25945207.

It is an arithmetic number, because the mean of its divisors is an integer number (25945207).

Almost surely, 2^51890413 is an apocalyptic number.

It is an amenable number.

51890413 is a deficient number, since it is larger than the sum of its proper divisors (1).

51890413 is an equidigital number, since it uses as much as digits as its factorization.

51890413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 51890413 is about 7203.5000520580. The cubic root of 51890413 is about 372.9887295432.

The spelling of 51890413 in words is "fifty-one million, eight hundred ninety thousand, four hundred thirteen".