2158860551 has 4 divisors (see below), whose sum is σ = 2169819432. Its totient is φ = 2147901672.

The previous prime is 2158860521. The next prime is 2158860559. The reversal of 2158860551 is 1550688512.

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 2158860551 - 2²⁶ = 2091751687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2158860499 and 2158860508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158860559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5479145 + ... + 5479538.

It is an arithmetic number, because the mean of its divisors is an integer number (542454858).

Almost surely, 2^2158860551 is an apocalyptic number.

2158860551 is a deficient number, since it is larger than the sum of its proper divisors (10958881).

2158860551 is a wasteful number, since it uses less digits than its factorization.

2158860551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10958880.

The product of its (nonzero) digits is 96000, while the sum is 41.

The square root of 2158860551 is about 46463.5400179539. The cubic root of 2158860551 is about 1292.4334714038.

The spelling of 2158860551 in words is "two billion, one hundred fifty-eight million, eight hundred sixty thousand, five hundred fifty-one".