2053521397 has 12 divisors (see below), whose sum is σ = 2157584800. Its totient is φ = 1954267128.

The previous prime is 2053521377. The next prime is 2053521413. The reversal of 2053521397 is 7931253502.

It is not a de Polignac number, because 2053521397 - 2²⁷ = 1919303669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2053521347) 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, 95518 + ... + 115024.

Almost surely, 2^2053521397 is an apocalyptic number.

It is an amenable number.

2053521397 is a deficient number, since it is larger than the sum of its proper divisors (104063403).

2053521397 is a wasteful number, since it uses less digits than its factorization.

2053521397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19752 (or 19729 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 2053521397 is about 45315.7963297568. The cubic root of 2053521397 is about 1271.0610507777.

Adding to 2053521397 its reverse (7931253502), we get a palindrome (9984774899).

The spelling of 2053521397 in words is "two billion, fifty-three million, five hundred twenty-one thousand, three hundred ninety-seven".