231011387 has 8 divisors (see below), whose sum is σ = 239562336. Its totient is φ = 222581952.

The previous prime is 231011383. The next prime is 231011393. The reversal of 231011387 is 783110132.

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

It is a cyclic number.

It is not a de Polignac number, because 231011387 - 2² = 231011383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231011381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26498 + ... + 34119.

It is an arithmetic number, because the mean of its divisors is an integer number (29945292).

Almost surely, 2^231011387 is an apocalyptic number.

231011387 is a deficient number, since it is larger than the sum of its proper divisors (8550949).

231011387 is a wasteful number, since it uses less digits than its factorization.

231011387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60757.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 231011387 is about 15199.0587537518. The cubic root of 231011387 is about 613.5893258018.

The spelling of 231011387 in words is "two hundred thirty-one million, eleven thousand, three hundred eighty-seven".