15045414421 has 4 divisors (see below), whose sum is σ = 15088773312. Its totient is φ = 15002055532.

The previous prime is 15045414403. The next prime is 15045414427. The reversal of 15045414421 is 12441454051.

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 an emirpimes, since its reverse is a distinct semiprime: 12441454051 = 13 ⋅957034927.

It is a cyclic number.

It is not a de Polignac number, because 15045414421 - 2⁵ = 15045414389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15045414427) 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, 21678925 + ... + 21679618.

It is an arithmetic number, because the mean of its divisors is an integer number (3772193328).

Almost surely, 2^15045414421 is an apocalyptic number.

It is an amenable number.

15045414421 is a deficient number, since it is larger than the sum of its proper divisors (43358891).

15045414421 is an equidigital number, since it uses as much as digits as its factorization.

15045414421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43358890.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 15045414421 its reverse (12441454051), we get a palindrome (27486868472).

The spelling of 15045414421 in words is "fifteen billion, forty-five million, four hundred fourteen thousand, four hundred twenty-one".