157237231 has 8 divisors (see below), whose sum is σ = 160763904. Its totient is φ = 153718200.

The previous prime is 157237207. The next prime is 157237253. The reversal of 157237231 is 132732751.

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

It is a de Polignac number, because none of the positive numbers 2^k-157237231 is a prime.

It is a super-2 number, since 2×157237231² = 49447093625094722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157237193 and 157237202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157237631) 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, 65706 + ... + 68056.

It is an arithmetic number, because the mean of its divisors is an integer number (20095488).

Almost surely, 2^157237231 is an apocalyptic number.

157237231 is a deficient number, since it is larger than the sum of its proper divisors (3526673).

157237231 is a wasteful number, since it uses less digits than its factorization.

157237231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821.

The product of its digits is 8820, while the sum is 31.

The square root of 157237231 is about 12539.4270602767. The cubic root of 157237231 is about 539.7406516389.

Adding to 157237231 its reverse (132732751), we get a palindrome (289969982).

The spelling of 157237231 in words is "one hundred fifty-seven million, two hundred thirty-seven thousand, two hundred thirty-one".