157856305 has 16 divisors (see below), whose sum is σ = 201176784. Its totient is φ = 118497280.

The previous prime is 157856287. The next prime is 157856317. The reversal of 157856305 is 503658751.

It can be written as a sum of positive squares in 8 ways, for example, as 3873024 + 153983281 = 1968^2 + 12409^2 .

It is not a de Polignac number, because 157856305 - 2⁷ = 157856177 is a prime.

It is a super-2 number, since 2×157856305² = 49837226056506050, 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, 27375 + ... + 32635.

It is an arithmetic number, because the mean of its divisors is an integer number (12573549).

Almost surely, 2^157856305 is an apocalyptic number.

It is an amenable number.

157856305 is a deficient number, since it is larger than the sum of its proper divisors (43320479).

157856305 is a wasteful number, since it uses less digits than its factorization.

157856305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636.

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 157856305 is about 12564.0879095938. The cubic root of 157856305 is about 540.4480791662.

The spelling of 157856305 in words is "one hundred fifty-seven million, eight hundred fifty-six thousand, three hundred five".