157205663 has 2 divisors, whose sum is σ = 157205664. Its totient is φ = 157205662.

The previous prime is 157205627. The next prime is 157205687. The reversal of 157205663 is 366502751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157205663 - 2⁶ = 157205599 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157205623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78602831 + 78602832.

It is an arithmetic number, because the mean of its divisors is an integer number (78602832).

Almost surely, 2^157205663 is an apocalyptic number.

157205663 is a deficient number, since it is larger than the sum of its proper divisors (1).

157205663 is an equidigital number, since it uses as much as digits as its factorization.

157205663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 157205663 is about 12538.1682473956. The cubic root of 157205663 is about 539.7045285715.

The spelling of 157205663 in words is "one hundred fifty-seven million, two hundred five thousand, six hundred sixty-three".