2155452131 has 40 divisors (see below), whose sum is σ = 2720555280. Its totient is φ = 1701653184.

The previous prime is 2155452121. The next prime is 2155452137. The reversal of 2155452131 is 1312545512.

It is not a de Polignac number, because 2155452131 - 2¹⁰ = 2155451107 is a prime.

It is a super-2 number, since 2×2155452131² = 9291947778064882322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2155452094 and 2155452103.

It is not an unprimeable number, because it can be changed into a prime (2155452137) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1687265 + ... + 1688541.

It is an arithmetic number, because the mean of its divisors is an integer number (68013882).

Almost surely, 2^2155452131 is an apocalyptic number.

2155452131 is a deficient number, since it is larger than the sum of its proper divisors (565103149).

2155452131 is an equidigital number, since it uses as much as digits as its factorization.

2155452131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361 (or 1340 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 2155452131 is about 46426.8470930344. The cubic root of 2155452131 is about 1291.7529462968.

Adding to 2155452131 its reverse (1312545512), we get a palindrome (3467997643).

The spelling of 2155452131 in words is "two billion, one hundred fifty-five million, four hundred fifty-two thousand, one hundred thirty-one".