2155961942331 has 8 divisors (see below), whose sum is σ = 2880617210880. Its totient is φ = 1434307317672.

The previous prime is 2155961942327. The next prime is 2155961942341. The reversal of 2155961942331 is 1332491695512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2155961942331 - 2² = 2155961942327 is a prime.

It is a super-2 number, since 2×2155961942331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2155961942341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750159295 + ... + 750162168.

It is an arithmetic number, because the mean of its divisors is an integer number (360077151360).

Almost surely, 2^{2155961942331} is an apocalyptic number.

2155961942331 is a deficient number, since it is larger than the sum of its proper divisors (724655268549).

2155961942331 is a wasteful number, since it uses less digits than its factorization.

2155961942331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500321945.

The product of its digits is 1749600, while the sum is 51.

The spelling of 2155961942331 in words is "two trillion, one hundred fifty-five billion, nine hundred sixty-one million, nine hundred forty-two thousand, three hundred thirty-one".