231540986 has 8 divisors (see below), whose sum is σ = 367741620. Its totient is φ = 108960448.

The previous prime is 231540937. The next prime is 231540997. The reversal of 231540986 is 689045132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 217710025 + 13830961 = 14755^2 + 3719^2 .

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

It is a super-2 number, since 2×231540986² = 107222456395704392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3404981 + ... + 3405048.

Almost surely, 2^231540986 is an apocalyptic number.

231540986 is a deficient number, since it is larger than the sum of its proper divisors (136200634).

231540986 is a wasteful number, since it uses less digits than its factorization.

231540986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810048.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 231540986 is about 15216.4708786236. The cubic root of 231540986 is about 614.0578572308.

The spelling of 231540986 in words is "two hundred thirty-one million, five hundred forty thousand, nine hundred eighty-six".