2152251161 has 4 divisors (see below), whose sum is σ = 2152355712. Its totient is φ = 2152146612.

The previous prime is 2152251149. The next prime is 2152251173. The reversal of 2152251161 is 1611522512.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (2152251149) and next prime (2152251173).

It is a cyclic number.

It is not a de Polignac number, because 2152251161 - 2²² = 2148056857 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 2152251161.

It is not an unprimeable number, because it can be changed into a prime (2152251121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10001 + ... + 66366.

It is an arithmetic number, because the mean of its divisors is an integer number (538088928).

Almost surely, 2^2152251161 is an apocalyptic number.

It is an amenable number.

2152251161 is a deficient number, since it is larger than the sum of its proper divisors (104551).

2152251161 is an equidigital number, since it uses as much as digits as its factorization.

2152251161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104550.

The product of its digits is 1200, while the sum is 26.

The square root of 2152251161 is about 46392.3610198921. The cubic root of 2152251161 is about 1291.1131871027.

Adding to 2152251161 its reverse (1611522512), we get a palindrome (3763773673).

The spelling of 2152251161 in words is "two billion, one hundred fifty-two million, two hundred fifty-one thousand, one hundred sixty-one".