2320215551 has 16 divisors (see below), whose sum is σ = 2446537728. Its totient is φ = 2196136800.

The previous prime is 2320215523. The next prime is 2320215577. The reversal of 2320215551 is 1555120232.

It is a cyclic number.

It is not a de Polignac number, because 2320215551 - 2¹⁰ = 2320214527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2320215551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2320215851) 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, 977396 + ... + 979766.

It is an arithmetic number, because the mean of its divisors is an integer number (152908608).

Almost surely, 2^2320215551 is an apocalyptic number.

2320215551 is a deficient number, since it is larger than the sum of its proper divisors (126322177).

2320215551 is a wasteful number, since it uses less digits than its factorization.

2320215551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2320215551 is about 48168.6158302271. The cubic root of 2320215551 is about 1323.8621870398.

Adding to 2320215551 its reverse (1555120232), we get a palindrome (3875335783).

The spelling of 2320215551 in words is "two billion, three hundred twenty million, two hundred fifteen thousand, five hundred fifty-one".