231406477 has 4 divisors (see below), whose sum is σ = 231447580. Its totient is φ = 231365376.

The previous prime is 231406463. The next prime is 231406481. The reversal of 231406477 is 774604132.

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 229037956 + 2368521 = 15134^2 + 1539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231406477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231403477) 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, 10452 + ... + 23917.

It is an arithmetic number, because the mean of its divisors is an integer number (57861895).

Almost surely, 2^231406477 is an apocalyptic number.

It is an amenable number.

231406477 is a deficient number, since it is larger than the sum of its proper divisors (41103).

231406477 is an equidigital number, since it uses as much as digits as its factorization.

231406477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41102.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 231406477 is about 15212.0503877682. The cubic root of 231406477 is about 613.9389260801.

The spelling of 231406477 in words is "two hundred thirty-one million, four hundred six thousand, four hundred seventy-seven".