2331220155 has 16 divisors (see below), whose sum is σ = 4069039104. Its totient is φ = 1130288480.

The previous prime is 2331220147. The next prime is 2331220159. The reversal of 2331220155 is 5510221332.

It is a happy number.

It is not a de Polignac number, because 2331220155 - 2³ = 2331220147 is a prime.

It is a super-2 number, since 2×2331220155² = 10869174822156448050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2331220159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7064139 + ... + 7064468.

It is an arithmetic number, because the mean of its divisors is an integer number (254314944).

Almost surely, 2^2331220155 is an apocalyptic number.

2331220155 is a deficient number, since it is larger than the sum of its proper divisors (1737818949).

2331220155 is a wasteful number, since it uses less digits than its factorization.

2331220155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14128626.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 2331220155 is about 48282.7107254761. The cubic root of 2331220155 is about 1325.9518789596.

Adding to 2331220155 its reverse (5510221332), we get a palindrome (7841441487).

The spelling of 2331220155 in words is "two billion, three hundred thirty-one million, two hundred twenty thousand, one hundred fifty-five".