231232210987 has 2 divisors, whose sum is σ = 231232210988. Its totient is φ = 231232210986.

The previous prime is 231232210967. The next prime is 231232211053. The reversal of 231232210987 is 789012232132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231232210987 is a prime.

It is not a weakly prime, because it can be changed into another prime (231232210907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115616105493 + 115616105494.

It is an arithmetic number, because the mean of its divisors is an integer number (115616105494).

Almost surely, 2^231232210987 is an apocalyptic number.

231232210987 is a deficient number, since it is larger than the sum of its proper divisors (1).

231232210987 is an equidigital number, since it uses as much as digits as its factorization.

231232210987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 231232210987 in words is "two hundred thirty-one billion, two hundred thirty-two million, two hundred ten thousand, nine hundred eighty-seven".