51440359 has 2 divisors, whose sum is σ = 51440360. Its totient is φ = 51440358.

The previous prime is 51440327. The next prime is 51440371. The reversal of 51440359 is 95304415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51440359 - 2⁵ = 51440327 is a prime.

It is a super-2 number, since 2×51440359² = 5292221068097762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51440359.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51440159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25720179 + 25720180.

It is an arithmetic number, because the mean of its divisors is an integer number (25720180).

Almost surely, 2^51440359 is an apocalyptic number.

51440359 is a deficient number, since it is larger than the sum of its proper divisors (1).

51440359 is an equidigital number, since it uses as much as digits as its factorization.

51440359 is an evil number, because the sum of its binary digits is even.

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

The square root of 51440359 is about 7172.1934580712. The cubic root of 51440359 is about 371.9072662632.

The spelling of 51440359 in words is "fifty-one million, four hundred forty thousand, three hundred fifty-nine".