231061831 has 32 divisors (see below), whose sum is σ = 326592000. Its totient is φ = 157438080.

The previous prime is 231061829. The next prime is 231061837. The reversal of 231061831 is 138160132.

It is a cyclic number.

It is not a de Polignac number, because 231061831 - 2¹ = 231061829 is a prime.

It is a super-2 number, since 2×231061831² = 106779139490145122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231061796 and 231061805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231061837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12945 + ... + 25093.

It is an arithmetic number, because the mean of its divisors is an integer number (10206000).

Almost surely, 2^231061831 is an apocalyptic number.

231061831 is a deficient number, since it is larger than the sum of its proper divisors (95530169).

231061831 is a wasteful number, since it uses less digits than its factorization.

231061831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12199.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 231061831 is about 15200.7181080369. The cubic root of 231061831 is about 613.6339839861.

The spelling of 231061831 in words is "two hundred thirty-one million, sixty-one thousand, eight hundred thirty-one".