51485957 has 2 divisors, whose sum is σ = 51485958. Its totient is φ = 51485956.

The previous prime is 51485923. The next prime is 51485963. The reversal of 51485957 is 75958415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 3682561 = 6914^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 51485957 - 2⁶ = 51485893 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51485977) 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 as a sum of consecutive naturals, namely, 25742978 + 25742979.

It is an arithmetic number, because the mean of its divisors is an integer number (25742979).

Almost surely, 2^51485957 is an apocalyptic number.

It is an amenable number.

51485957 is a deficient number, since it is larger than the sum of its proper divisors (1).

51485957 is an equidigital number, since it uses as much as digits as its factorization.

51485957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252000, while the sum is 44.

The square root of 51485957 is about 7175.3715583237. The cubic root of 51485957 is about 372.0171230604.

The spelling of 51485957 in words is "fifty-one million, four hundred eighty-five thousand, nine hundred fifty-seven".