231228293 has 2 divisors, whose sum is σ = 231228294. Its totient is φ = 231228292.

The previous prime is 231228259. The next prime is 231228301. The reversal of 231228293 is 392822132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188430529 + 42797764 = 13727^2 + 6542^2 .

It is a cyclic number.

It is not a de Polignac number, because 231228293 - 2⁸ = 231228037 is a prime.

It is a super-3 number, since 3×231228293³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231228253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115614146 + 115614147.

It is an arithmetic number, because the mean of its divisors is an integer number (115614147).

Almost surely, 2^231228293 is an apocalyptic number.

It is an amenable number.

231228293 is a deficient number, since it is larger than the sum of its proper divisors (1).

231228293 is an equidigital number, since it uses as much as digits as its factorization.

231228293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 231228293 is about 15206.1925872323. The cubic root of 231228293 is about 613.7813070641.

The spelling of 231228293 in words is "two hundred thirty-one million, two hundred twenty-eight thousand, two hundred ninety-three".