231820955 has 16 divisors (see below), whose sum is σ = 285652224. Its totient is φ = 180509280.

The previous prime is 231820951. The next prime is 231820961. The reversal of 231820955 is 559028132.

It is not a de Polignac number, because 231820955 - 2² = 231820951 is a prime.

It is a super-2 number, since 2×231820955² = 107481910354224050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231820951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65132 + ... + 68598.

It is an arithmetic number, because the mean of its divisors is an integer number (17853264).

Almost surely, 2^231820955 is an apocalyptic number.

231820955 is a deficient number, since it is larger than the sum of its proper divisors (53831269).

231820955 is a wasteful number, since it uses less digits than its factorization.

231820955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 231820955 is about 15225.6676372499. The cubic root of 231820955 is about 614.3052546387.

The spelling of 231820955 in words is "two hundred thirty-one million, eight hundred twenty thousand, nine hundred fifty-five".