2553156021 has 8 divisors (see below), whose sum is σ = 3666070240. Its totient is φ = 1571172912.

The previous prime is 2553156007. The next prime is 2553156041. The reversal of 2553156021 is 1206513552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2553156021 - 2¹¹ = 2553153973 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 2553156021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2553156041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32732731 + ... + 32732808.

It is an arithmetic number, because the mean of its divisors is an integer number (458258780).

Almost surely, 2^2553156021 is an apocalyptic number.

It is an amenable number.

2553156021 is a deficient number, since it is larger than the sum of its proper divisors (1112914219).

2553156021 is a wasteful number, since it uses less digits than its factorization.

2553156021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65465555.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 2553156021 is about 50528.7642932221. The cubic root of 2553156021 is about 1366.7606027508.

Adding to 2553156021 its reverse (1206513552), we get a palindrome (3759669573).

The spelling of 2553156021 in words is "two billion, five hundred fifty-three million, one hundred fifty-six thousand, twenty-one".