15045421123 has 4 divisors (see below), whose sum is σ = 15080168488. Its totient is φ = 15010673760.

The previous prime is 15045421093. The next prime is 15045421129. The reversal of 15045421123 is 32112454051.

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

It is a cyclic number.

It is not a de Polignac number, because 15045421123 - 2⁵ = 15045421091 is a prime.

It is a super-2 number, since 2×15045421123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15045421091 and 15045421100.

It is not an unprimeable number, because it can be changed into a prime (15045421129) 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, 17373033 + ... + 17373898.

It is an arithmetic number, because the mean of its divisors is an integer number (3770042122).

Almost surely, 2^15045421123 is an apocalyptic number.

15045421123 is a deficient number, since it is larger than the sum of its proper divisors (34747365).

15045421123 is an equidigital number, since it uses as much as digits as its factorization.

15045421123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34747364.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 15045421123 its reverse (32112454051), we get a palindrome (47157875174).

The spelling of 15045421123 in words is "fifteen billion, forty-five million, four hundred twenty-one thousand, one hundred twenty-three".