2331121557 has 16 divisors (see below), whose sum is σ = 3207036672. Its totient is φ = 1505326080.

The previous prime is 2331121519. The next prime is 2331121567. The reversal of 2331121557 is 7551211332.

2331121557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2331121557 - 2¹² = 2331117461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2331121567) 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, 71544 + ... + 98897.

It is an arithmetic number, because the mean of its divisors is an integer number (200439792).

Almost surely, 2^2331121557 is an apocalyptic number.

It is an amenable number.

2331121557 is a deficient number, since it is larger than the sum of its proper divisors (875915115).

2331121557 is a wasteful number, since it uses less digits than its factorization.

2331121557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170588.

The product of its digits is 6300, while the sum is 30.

The square root of 2331121557 is about 48281.6896659593. The cubic root of 2331121557 is about 1325.9331851658.

Adding to 2331121557 its reverse (7551211332), we get a palindrome (9882332889).

The spelling of 2331121557 in words is "two billion, three hundred thirty-one million, one hundred twenty-one thousand, five hundred fifty-seven".