157535621 has 2 divisors, whose sum is σ = 157535622. Its totient is φ = 157535620.

The previous prime is 157535591. The next prime is 157535641. The reversal of 157535621 is 126535751.

157535621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152522500 + 5013121 = 12350^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 157535621 - 2²² = 153341317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157535641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78767810 + 78767811.

It is an arithmetic number, because the mean of its divisors is an integer number (78767811).

Almost surely, 2^157535621 is an apocalyptic number.

It is an amenable number.

157535621 is a deficient number, since it is larger than the sum of its proper divisors (1).

157535621 is an equidigital number, since it uses as much as digits as its factorization.

157535621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 35.

The square root of 157535621 is about 12551.3194923880. The cubic root of 157535621 is about 540.0818588752.

The spelling of 157535621 in words is "one hundred fifty-seven million, five hundred thirty-five thousand, six hundred twenty-one".