2312611551 has 6 divisors (see below), whose sum is σ = 3340438920. Its totient is φ = 1541741028.

The previous prime is 2312611549. The next prime is 2312611559. The reversal of 2312611551 is 1551162132.

It is not a de Polignac number, because 2312611551 - 2¹ = 2312611549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312611559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128478411 + ... + 128478428.

It is an arithmetic number, because the mean of its divisors is an integer number (556739820).

Almost surely, 2^2312611551 is an apocalyptic number.

2312611551 is a deficient number, since it is larger than the sum of its proper divisors (1027827369).

2312611551 is a wasteful number, since it uses less digits than its factorization.

2312611551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256956845 (or 256956842 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 2312611551 is about 48089.6199922603. The cubic root of 2312611551 is about 1322.4143811505.

Adding to 2312611551 its reverse (1551162132), we get a palindrome (3863773683).

The spelling of 2312611551 in words is "two billion, three hundred twelve million, six hundred eleven thousand, five hundred fifty-one".