2251020511215 has 64 divisors (see below), whose sum is σ = 4697110225920. Its totient is φ = 1001226096000.

The previous prime is 2251020511189. The next prime is 2251020511219. The reversal of 2251020511215 is 5121150201522.

2251020511215 is a `hidden beast` number, since 2 + 2 + 510 + 20 + 5 + 1 + 121 + 5 = 666.

It is not a de Polignac number, because 2251020511215 - 2⁶ = 2251020511151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251020511219) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32154661 + ... + 32224590.

It is an arithmetic number, because the mean of its divisors is an integer number (73392347280).

Almost surely, 2^{2251020511215} is an apocalyptic number.

2251020511215 is an abundant number, since it is smaller than the sum of its proper divisors (2446089714705).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2251020511215 is a wasteful number, since it uses less digits than its factorization.

2251020511215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64379309 (or 64379303 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 2251020511215 its reverse (5121150201522), we get a palindrome (7372170712737).

The spelling of 2251020511215 in words is "two trillion, two hundred fifty-one billion, twenty million, five hundred eleven thousand, two hundred fifteen".