53503157 has 2 divisors, whose sum is σ = 53503158. Its totient is φ = 53503156.

The previous prime is 53503123. The next prime is 53503159. The reversal of 53503157 is 75130535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30019441 + 23483716 = 5479^2 + 4846^2 .

It is a cyclic number.

It is not a de Polignac number, because 53503157 - 2²⁰ = 52454581 is a prime.

Together with 53503159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53503159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26751578 + 26751579.

It is an arithmetic number, because the mean of its divisors is an integer number (26751579).

Almost surely, 2^53503157 is an apocalyptic number.

It is an amenable number.

53503157 is a deficient number, since it is larger than the sum of its proper divisors (1).

53503157 is an equidigital number, since it uses as much as digits as its factorization.

53503157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7875, while the sum is 29.

The square root of 53503157 is about 7314.5852240575. The cubic root of 53503157 is about 376.8135137177.

The spelling of 53503157 in words is "fifty-three million, five hundred three thousand, one hundred fifty-seven".