157836731 has 8 divisors (see below), whose sum is σ = 172307520. Its totient is φ = 143698752.

The previous prime is 157836691. The next prime is 157836733. The reversal of 157836731 is 137638751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157836731 - 2¹⁰ = 157835707 is a prime.

It is a super-2 number, since 2×157836731² = 49824867305532722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157836733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82211 + ... + 84108.

It is an arithmetic number, because the mean of its divisors is an integer number (21538440).

Almost surely, 2^157836731 is an apocalyptic number.

157836731 is a deficient number, since it is larger than the sum of its proper divisors (14470789).

157836731 is a wasteful number, since it uses less digits than its factorization.

157836731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166405.

The product of its digits is 105840, while the sum is 41.

The square root of 157836731 is about 12563.3089192298. The cubic root of 157836731 is about 540.4257399298.

The spelling of 157836731 in words is "one hundred fifty-seven million, eight hundred thirty-six thousand, seven hundred thirty-one".