1055423231 has 4 divisors (see below), whose sum is σ = 1055632200. Its totient is φ = 1055214264.

The previous prime is 1055423227. The next prime is 1055423233. The reversal of 1055423231 is 1323245501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323245501 = 9497 ⋅139333.

It is a cyclic number.

It is not a de Polignac number, because 1055423231 - 2² = 1055423227 is a prime.

It is a super-2 number, since 2×1055423231² = 2227836393068958722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1055423231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055423233) 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, 96716 + ... + 107073.

It is an arithmetic number, because the mean of its divisors is an integer number (263908050).

Almost surely, 2^1055423231 is an apocalyptic number.

1055423231 is a deficient number, since it is larger than the sum of its proper divisors (208969).

1055423231 is an equidigital number, since it uses as much as digits as its factorization.

1055423231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208968.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1055423231 is about 32487.2779869290. The cubic root of 1055423231 is about 1018.1432423110.

Adding to 1055423231 its reverse (1323245501), we get a palindrome (2378668732).

The spelling of 1055423231 in words is "one billion, fifty-five million, four hundred twenty-three thousand, two hundred thirty-one".