231550433 has 2 divisors, whose sum is σ = 231550434. Its totient is φ = 231550432.

The previous prime is 231550409. The next prime is 231550441. The reversal of 231550433 is 334055132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138485824 + 93064609 = 11768^2 + 9647^2 .

It is a cyclic number.

It is not a de Polignac number, because 231550433 - 2⁶ = 231550369 is a prime.

It is not a weakly prime, because it can be changed into another prime (231550133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115775216 + 115775217.

It is an arithmetic number, because the mean of its divisors is an integer number (115775217).

Almost surely, 2^231550433 is an apocalyptic number.

It is an amenable number.

231550433 is a deficient number, since it is larger than the sum of its proper divisors (1).

231550433 is an equidigital number, since it uses as much as digits as its factorization.

231550433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 231550433 is about 15216.7812956617. The cubic root of 231550433 is about 614.0662084171.

The spelling of 231550433 in words is "two hundred thirty-one million, five hundred fifty thousand, four hundred thirty-three".