331620055 has 32 divisors (see below), whose sum is σ = 438092928. Its totient is φ = 239500800.

The previous prime is 331620043. The next prime is 331620089. The reversal of 331620055 is 550026133.

It is a happy number.

It is not a de Polignac number, because 331620055 - 2¹⁵ = 331587287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 835117 + ... + 835513.

It is an arithmetic number, because the mean of its divisors is an integer number (13690404).

Almost surely, 2^331620055 is an apocalyptic number.

331620055 is a deficient number, since it is larger than the sum of its proper divisors (106472873).

331620055 is a wasteful number, since it uses less digits than its factorization.

331620055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 331620055 is about 18210.4380782012. The cubic root of 331620055 is about 692.1713124315.

Adding to 331620055 its reverse (550026133), we get a palindrome (881646188).

The spelling of 331620055 in words is "three hundred thirty-one million, six hundred twenty thousand, fifty-five".