157197905 has 16 divisors (see below), whose sum is σ = 192150144. Its totient is φ = 123432960.

The previous prime is 157197899. The next prime is 157197917. The reversal of 157197905 is 509791751.

157197905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157197905 - 2¹² = 157193809 is a prime.

It is a super-2 number, since 2×157197905² = 49422362672778050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90374 + ... + 92096.

It is an arithmetic number, because the mean of its divisors is an integer number (12009384).

Almost surely, 2^157197905 is an apocalyptic number.

It is an amenable number.

157197905 is a deficient number, since it is larger than the sum of its proper divisors (34952239).

157197905 is a wasteful number, since it uses less digits than its factorization.

157197905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 99225, while the sum is 44.

The square root of 157197905 is about 12537.8588682438. The cubic root of 157197905 is about 539.6956503998.

The spelling of 157197905 in words is "one hundred fifty-seven million, one hundred ninety-seven thousand, nine hundred five".