2053972581 has 4 divisors (see below), whose sum is σ = 2738630112. Its totient is φ = 1369315052.

The previous prime is 2053972573. The next prime is 2053972607. The reversal of 2053972581 is 1852793502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2053972581 - 2³ = 2053972573 is a prime.

It is a super-2 number, since 2×2053972581² = 8437606726999603122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2053932581) 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, 342328761 + ... + 342328766.

It is an arithmetic number, because the mean of its divisors is an integer number (684657528).

Almost surely, 2^2053972581 is an apocalyptic number.

It is an amenable number.

2053972581 is a deficient number, since it is larger than the sum of its proper divisors (684657531).

2053972581 is an equidigital number, since it uses as much as digits as its factorization.

2053972581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684657530.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 2053972581 is about 45320.7742762632. The cubic root of 2053972581 is about 1271.1541332286.

The spelling of 2053972581 in words is "two billion, fifty-three million, nine hundred seventy-two thousand, five hundred eighty-one".