231212377 has 8 divisors (see below), whose sum is σ = 255997152. Its totient is φ = 207055200.

The previous prime is 231212339. The next prime is 231212383. The reversal of 231212377 is 773212132.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-231212377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231210377) 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, 156124 + ... + 157597.

It is an arithmetic number, because the mean of its divisors is an integer number (31999644).

Almost surely, 2^231212377 is an apocalyptic number.

It is an amenable number.

231212377 is a deficient number, since it is larger than the sum of its proper divisors (24784775).

231212377 is a wasteful number, since it uses less digits than its factorization.

231212377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313799.

The product of its digits is 3528, while the sum is 28.

The square root of 231212377 is about 15205.6692388070. The cubic root of 231212377 is about 613.7672240594.

The spelling of 231212377 in words is "two hundred thirty-one million, two hundred twelve thousand, three hundred seventy-seven".