231405970 has 8 divisors (see below), whose sum is σ = 416530764. Its totient is φ = 92562384.

The previous prime is 231405961. The next prime is 231405971. The reversal of 231405970 is 79504132.

It can be written as a sum of positive squares in 2 ways, for example, as 226111369 + 5294601 = 15037^2 + 2301^2 .

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

It is not an unprimeable number, because it can be changed into a prime (231405971) 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, 11570289 + ... + 11570308.

Almost surely, 2^231405970 is an apocalyptic number.

231405970 is a deficient number, since it is larger than the sum of its proper divisors (185124794).

231405970 is a wasteful number, since it uses less digits than its factorization.

231405970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23140604.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 231405970 is about 15212.0337233389. The cubic root of 231405970 is about 613.9384777100.

The spelling of 231405970 in words is "two hundred thirty-one million, four hundred five thousand, nine hundred seventy".