53815901 has 2 divisors, whose sum is σ = 53815902. Its totient is φ = 53815900.

The previous prime is 53815873. The next prime is 53815913. The reversal of 53815901 is 10951835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30525625 + 23290276 = 5525^2 + 4826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53815901 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_3215849 and since 53815901 and 3215849 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53815981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26907950 + 26907951.

It is an arithmetic number, because the mean of its divisors is an integer number (26907951).

Almost surely, 2^53815901 is an apocalyptic number.

It is an amenable number.

53815901 is a deficient number, since it is larger than the sum of its proper divisors (1).

53815901 is an equidigital number, since it uses as much as digits as its factorization.

53815901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 53815901 is about 7335.9321834379. The cubic root of 53815901 is about 377.5462884923.

The spelling of 53815901 in words is "fifty-three million, eight hundred fifteen thousand, nine hundred one".