53157997 has 8 divisors (see below), whose sum is σ = 57240000. Its totient is φ = 49182144.

The previous prime is 53157961. The next prime is 53158051. The reversal of 53157997 is 79975135.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53157997 - 2⁷ = 53157869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53157947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25497 + ... + 27502.

It is an arithmetic number, because the mean of its divisors is an integer number (7155000).

Almost surely, 2^53157997 is an apocalyptic number.

It is an amenable number.

53157997 is a deficient number, since it is larger than the sum of its proper divisors (4082003).

53157997 is a wasteful number, since it uses less digits than its factorization.

53157997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53075.

The product of its digits is 297675, while the sum is 46.

The square root of 53157997 is about 7290.9530927033. The cubic root of 53157997 is about 376.0014641749.

The spelling of 53157997 in words is "fifty-three million, one hundred fifty-seven thousand, nine hundred ninety-seven".