2152122511553 has 4 divisors (see below), whose sum is σ = 2459568584640. Its totient is φ = 1844676438468.

The previous prime is 2152122511547. The next prime is 2152122511573. The reversal of 2152122511553 is 3551152212512.

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 2152122511553 - 2²² = 2152118317249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2152122511543) 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, 153723036533 + ... + 153723036546.

It is an arithmetic number, because the mean of its divisors is an integer number (614892146160).

Almost surely, 2^{2152122511553} is an apocalyptic number.

It is an amenable number.

2152122511553 is a deficient number, since it is larger than the sum of its proper divisors (307446073087).

2152122511553 is an equidigital number, since it uses as much as digits as its factorization.

2152122511553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307446073086.

The product of its digits is 30000, while the sum is 35.

The spelling of 2152122511553 in words is "two trillion, one hundred fifty-two billion, one hundred twenty-two million, five hundred eleven thousand, five hundred fifty-three".