23219969161 has 3 divisors (see below), whose sum is σ = 23220121543. Its totient is φ = 23219816780.

The previous prime is 23219969147. The next prime is 23219969203. The reversal of 23219969161 is 16196991232.

The square root of 23219969161 is 152381.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 6428992761 + 16790976400 = 80181^2 + 129580^2 .

It is not a de Polignac number, because 23219969161 - 2¹⁹ = 23219444873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23219969111) 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 2 ways as a sum of consecutive naturals, for example, 76191 + ... + 228571.

Almost surely, 2^23219969161 is an apocalyptic number.

23219969161 is the 152381-st square number.

23219969161 is the 76191-st centered octagonal number.

It is an amenable number.

23219969161 is a deficient number, since it is larger than the sum of its proper divisors (152382).

23219969161 is an frugal number, since it uses more digits than its factorization.

23219969161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304762 (or 152381 counting only the distinct ones).

The product of its digits is 314928, while the sum is 49.

Multiplying 23219969161 by its sum of digits (49), we get a square (1137778488889 = 1066667²).

The spelling of 23219969161 in words is "twenty-three billion, two hundred nineteen million, nine hundred sixty-nine thousand, one hundred sixty-one".