157153561 has 2 divisors, whose sum is σ = 157153562. Its totient is φ = 157153560.

The previous prime is 157153553. The next prime is 157153567. The reversal of 157153561 is 165351751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151659225 + 5494336 = 12315^2 + 2344^2 .

It is an emirp because it is prime and its reverse (165351751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157153561 - 2³ = 157153553 is a prime.

It is not a weakly prime, because it can be changed into another prime (157153567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78576780 + 78576781.

It is an arithmetic number, because the mean of its divisors is an integer number (78576781).

Almost surely, 2^157153561 is an apocalyptic number.

It is an amenable number.

157153561 is a deficient number, since it is larger than the sum of its proper divisors (1).

157153561 is an equidigital number, since it uses as much as digits as its factorization.

157153561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15750, while the sum is 34.

The square root of 157153561 is about 12536.0903394958. The cubic root of 157153561 is about 539.6448979960.

The spelling of 157153561 in words is "one hundred fifty-seven million, one hundred fifty-three thousand, five hundred sixty-one".