2156501567 has 12 divisors (see below), whose sum is σ = 2452110360. Its totient is φ = 1892850960.

The previous prime is 2156501549. The next prime is 2156501569. The reversal of 2156501567 is 7651056512.

It is not a de Polignac number, because 2156501567 - 2¹⁰ = 2156500543 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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 2156501567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156501569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 303773 + ... + 310790.

It is an arithmetic number, because the mean of its divisors is an integer number (204342530).

Almost surely, 2^2156501567 is an apocalyptic number.

2156501567 is a deficient number, since it is larger than the sum of its proper divisors (295608793).

2156501567 is a wasteful number, since it uses less digits than its factorization.

2156501567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614614 (or 614603 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 38.

The square root of 2156501567 is about 46438.1477559129. The cubic root of 2156501567 is about 1291.9625530703.

Subtracting 2156501567 from its reverse (7651056512), we obtain a palindrome (5494554945).

The spelling of 2156501567 in words is "two billion, one hundred fifty-six million, five hundred one thousand, five hundred sixty-seven".