231264405 has 24 divisors (see below), whose sum is σ = 402306840. Its totient is φ = 122895360.

The previous prime is 231264403. The next prime is 231264419. The reversal of 231264405 is 504462132.

231264405 is a `hidden beast` number, since 2 + 3 + 12 + 644 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 106316721 + 124947684 = 10311^2 + 11178^2 .

It is not a de Polignac number, because 231264405 - 2¹ = 231264403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231264401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3501 + ... + 21789.

It is an arithmetic number, because the mean of its divisors is an integer number (16762785).

Almost surely, 2^231264405 is an apocalyptic number.

It is an amenable number.

231264405 is a deficient number, since it is larger than the sum of its proper divisors (171042435).

231264405 is a wasteful number, since it uses less digits than its factorization.

231264405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18581 (or 18578 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 231264405 is about 15207.3799518523. The cubic root of 231264405 is about 613.8132577632.

The spelling of 231264405 in words is "two hundred thirty-one million, two hundred sixty-four thousand, four hundred five".