231042877 has 4 divisors (see below), whose sum is σ = 248815420. Its totient is φ = 213270336.

The previous prime is 231042871. The next prime is 231042893. The reversal of 231042877 is 778240132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19660356 + 211382521 = 4434^2 + 14539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231042877 is a prime.

It is a super-2 number, since 2×231042877² = 106761622024874258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231042871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8886252 + ... + 8886277.

It is an arithmetic number, because the mean of its divisors is an integer number (62203855).

Almost surely, 2^231042877 is an apocalyptic number.

It is an amenable number.

231042877 is a deficient number, since it is larger than the sum of its proper divisors (17772543).

231042877 is a wasteful number, since it uses less digits than its factorization.

231042877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17772542.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 231042877 is about 15200.0946378633. The cubic root of 231042877 is about 613.6172047305.

The spelling of 231042877 in words is "two hundred thirty-one million, forty-two thousand, eight hundred seventy-seven".