51522439 has 2 divisors, whose sum is σ = 51522440. Its totient is φ = 51522438.

The previous prime is 51522409. The next prime is 51522469. The reversal of 51522439 is 93422515.

It is a balanced prime because it is at equal distance from previous prime (51522409) and next prime (51522469).

It is a cyclic number.

It is not a de Polignac number, because 51522439 - 2⁵ = 51522407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51522439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51522409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25761219 + 25761220.

It is an arithmetic number, because the mean of its divisors is an integer number (25761220).

Almost surely, 2^51522439 is an apocalyptic number.

51522439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51522439 is an equidigital number, since it uses as much as digits as its factorization.

51522439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 51522439 is about 7177.9132761548. The cubic root of 51522439 is about 372.1049704731.

The spelling of 51522439 in words is "fifty-one million, five hundred twenty-two thousand, four hundred thirty-nine".