231570473 has 2 divisors, whose sum is σ = 231570474. Its totient is φ = 231570472.

The previous prime is 231570421. The next prime is 231570491. The reversal of 231570473 is 374075132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177209344 + 54361129 = 13312^2 + 7373^2 .

It is a cyclic number.

It is not a de Polignac number, because 231570473 - 2¹⁶ = 231504937 is a prime.

It is a super-3 number, since 3×231570473³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (231575473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115785236 + 115785237.

It is an arithmetic number, because the mean of its divisors is an integer number (115785237).

Almost surely, 2^231570473 is an apocalyptic number.

It is an amenable number.

231570473 is a deficient number, since it is larger than the sum of its proper divisors (1).

231570473 is an equidigital number, since it uses as much as digits as its factorization.

231570473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 231570473 is about 15217.4397649539. The cubic root of 231570473 is about 614.0839231062.

The spelling of 231570473 in words is "two hundred thirty-one million, five hundred seventy thousand, four hundred seventy-three".