51503953 has 2 divisors, whose sum is σ = 51503954. Its totient is φ = 51503952.

The previous prime is 51503939. The next prime is 51503957. The reversal of 51503953 is 35930515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49885969 + 1617984 = 7063^2 + 1272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51503953 is a prime.

It is not a weakly prime, because it can be changed into another prime (51503957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25751976 + 25751977.

It is an arithmetic number, because the mean of its divisors is an integer number (25751977).

Almost surely, 2^51503953 is an apocalyptic number.

It is an amenable number.

51503953 is a deficient number, since it is larger than the sum of its proper divisors (1).

51503953 is an equidigital number, since it uses as much as digits as its factorization.

51503953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 51503953 is about 7176.6254604793. The cubic root of 51503953 is about 372.0604619996.

The spelling of 51503953 in words is "fifty-one million, five hundred three thousand, nine hundred fifty-three".