231270381 has 12 divisors (see below), whose sum is σ = 342205500. Its totient is φ = 150419520.

The previous prime is 231270373. The next prime is 231270439. The reversal of 231270381 is 183072132.

It can be written as a sum of positive squares in 2 ways, for example, as 49829481 + 181440900 = 7059^2 + 13470^2 .

It is not a de Polignac number, because 231270381 - 2³ = 231270373 is a prime.

It is a super-2 number, since 2×231270381² = 106971978255770322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231270371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313006 + ... + 313743.

It is an arithmetic number, because the mean of its divisors is an integer number (28517125).

Almost surely, 2^231270381 is an apocalyptic number.

It is an amenable number.

231270381 is a deficient number, since it is larger than the sum of its proper divisors (110935119).

231270381 is a wasteful number, since it uses less digits than its factorization.

231270381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626796 (or 626793 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 231270381 is about 15207.5764341331. The cubic root of 231270381 is about 613.8185448089.

The spelling of 231270381 in words is "two hundred thirty-one million, two hundred seventy thousand, three hundred eighty-one".