231137154 has 12 divisors (see below), whose sum is σ = 500797206. Its totient is φ = 77045712.

The previous prime is 231137119. The next prime is 231137177. The reversal of 231137154 is 451731132.

It can be written as a sum of positive squares in only one way, i.e., 229977225 + 1159929 = 15165^2 + 1077^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6420459 + ... + 6420494.

Almost surely, 2^231137154 is an apocalyptic number.

231137154 is an abundant number, since it is smaller than the sum of its proper divisors (269660052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231137154 is a wasteful number, since it uses less digits than its factorization.

231137154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12840961 (or 12840958 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 231137154 is about 15203.1955193637. The cubic root of 231137154 is about 613.7006555070.

Adding to 231137154 its reverse (451731132), we get a palindrome (682868286).

The spelling of 231137154 in words is "two hundred thirty-one million, one hundred thirty-seven thousand, one hundred fifty-four".