2135201553 has 10 divisors (see below), whose sum is σ = 3189622194. Its totient is φ = 1423467648.

The previous prime is 2135201543. The next prime is 2135201569. The reversal of 2135201553 is 3551025312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1671746769 + 463454784 = 40887^2 + 21528^2 .

It is not a de Polignac number, because 2135201553 - 2⁹ = 2135201041 is a prime.

It is a super-2 number, since 2×2135201553² = 9118171343867223618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2135201543) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13180176 + ... + 13180337.

Almost surely, 2^2135201553 is an apocalyptic number.

It is an amenable number.

2135201553 is a deficient number, since it is larger than the sum of its proper divisors (1054420641).

2135201553 is an equidigital number, since it uses as much as digits as its factorization.

2135201553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26360525 (or 26360516 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 2135201553 is about 46208.2411805513. The cubic root of 2135201553 is about 1287.6948503037.

Adding to 2135201553 its reverse (3551025312), we get a palindrome (5686226865).

The spelling of 2135201553 in words is "two billion, one hundred thirty-five million, two hundred one thousand, five hundred fifty-three".