2155232331 has 12 divisors (see below), whose sum is σ = 3557843952. Its totient is φ = 1231561296.

The previous prime is 2155232311. The next prime is 2155232371. The reversal of 2155232331 is 1332325512.

It is a happy number.

It is not a de Polignac number, because 2155232331 - 2⁶ = 2155232267 is a prime.

It is a super-3 number, since 3×2155232331³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2155232295 and 2155232304.

It is not an unprimeable number, because it can be changed into a prime (2155232311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17104956 + ... + 17105081.

It is an arithmetic number, because the mean of its divisors is an integer number (296486996).

Almost surely, 2^2155232331 is an apocalyptic number.

2155232331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2155232331 is a deficient number, since it is larger than the sum of its proper divisors (1402611621).

2155232331 is a wasteful number, since it uses less digits than its factorization.

2155232331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34210050 (or 34210047 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 2155232331 is about 46424.4798678456. The cubic root of 2155232331 is about 1291.7090364143.

Adding to 2155232331 its reverse (1332325512), we get a palindrome (3487557843).

The spelling of 2155232331 in words is "two billion, one hundred fifty-five million, two hundred thirty-two thousand, three hundred thirty-one".