51626189 has 2 divisors, whose sum is σ = 51626190. Its totient is φ = 51626188.

The previous prime is 51626167. The next prime is 51626207. The reversal of 51626189 is 98162615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48930025 + 2696164 = 6995^2 + 1642^2 .

It is a cyclic number.

It is not a de Polignac number, because 51626189 - 2²⁰ = 50577613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51626489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25813094 + 25813095.

It is an arithmetic number, because the mean of its divisors is an integer number (25813095).

Almost surely, 2^51626189 is an apocalyptic number.

It is an amenable number.

51626189 is a deficient number, since it is larger than the sum of its proper divisors (1).

51626189 is an equidigital number, since it uses as much as digits as its factorization.

51626189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 51626189 is about 7185.1366723257. The cubic root of 51626189 is about 372.3545704986.

It can be divided in two parts, 51626 and 189, that added together give a palindrome (51815).

The spelling of 51626189 in words is "fifty-one million, six hundred twenty-six thousand, one hundred eighty-nine".