23451220133161 has 4 divisors (see below), whose sum is σ = 23459664939732. Its totient is φ = 23442775326592.

The previous prime is 23451220133113. The next prime is 23451220133167. The reversal of 23451220133161 is 16133102215432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14082607182400 + 9368612950761 = 3752680^2 + 3060819^2 .

It is a cyclic number.

It is not a de Polignac number, because 23451220133161 - 2¹⁵ = 23451220100393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23451220133167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4222399120 + ... + 4222404673.

It is an arithmetic number, because the mean of its divisors is an integer number (5864916234933).

Almost surely, 2^{23451220133161} is an apocalyptic number.

It is an amenable number.

23451220133161 is a deficient number, since it is larger than the sum of its proper divisors (8444806571).

23451220133161 is an equidigital number, since it uses as much as digits as its factorization.

23451220133161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8444806570.

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 23451220133161 its reverse (16133102215432), we get a palindrome (39584322348593).

The spelling of 23451220133161 in words is "twenty-three trillion, four hundred fifty-one billion, two hundred twenty million, one hundred thirty-three thousand, one hundred sixty-one".