231454021 has 4 divisors (see below), whose sum is σ = 235821132. Its totient is φ = 227086912.

The previous prime is 231453977. The next prime is 231454033. The reversal of 231454021 is 120454132.

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 210569121 + 20884900 = 14511^2 + 4570^2 .

It is a cyclic number.

It is not a de Polignac number, because 231454021 - 2²³ = 223065413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231453983 and 231454001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231454051) 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, 2183476 + ... + 2183581.

It is an arithmetic number, because the mean of its divisors is an integer number (58955283).

Almost surely, 2^231454021 is an apocalyptic number.

It is an amenable number.

231454021 is a deficient number, since it is larger than the sum of its proper divisors (4367111).

231454021 is an equidigital number, since it uses as much as digits as its factorization.

231454021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4367110.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 231454021 is about 15213.6130159801. The cubic root of 231454021 is about 613.9809691463.

The spelling of 231454021 in words is "two hundred thirty-one million, four hundred fifty-four thousand, twenty-one".