2115532522651 has 4 divisors (see below), whose sum is σ = 2167130876904. Its totient is φ = 2063934168400.

The previous prime is 2115532522627. The next prime is 2115532522667. The reversal of 2115532522651 is 1562252355112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2115532522651 - 2²¹ = 2115530425499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115532522951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25799177065 + ... + 25799177146.

It is an arithmetic number, because the mean of its divisors is an integer number (541782719226).

Almost surely, 2^{2115532522651} is an apocalyptic number.

2115532522651 is a deficient number, since it is larger than the sum of its proper divisors (51598354253).

2115532522651 is an equidigital number, since it uses as much as digits as its factorization.

2115532522651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51598354252.

The product of its digits is 180000, while the sum is 40.

Adding to 2115532522651 its reverse (1562252355112), we get a palindrome (3677784877763).

The spelling of 2115532522651 in words is "two trillion, one hundred fifteen billion, five hundred thirty-two million, five hundred twenty-two thousand, six hundred fifty-one".