15521330045 has 32 divisors (see below), whose sum is σ = 20156677632. Its totient is φ = 11405889792.

The previous prime is 15521330029. The next prime is 15521330057. The reversal of 15521330045 is 54003312551.

It is a cyclic number.

It is not a de Polignac number, because 15521330045 - 2⁴ = 15521330029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21349472 + ... + 21350198.

It is an arithmetic number, because the mean of its divisors is an integer number (629896176).

Almost surely, 2^15521330045 is an apocalyptic number.

It is an amenable number.

15521330045 is a deficient number, since it is larger than the sum of its proper divisors (4635347587).

15521330045 is a wasteful number, since it uses less digits than its factorization.

15521330045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 15521330045 its reverse (54003312551), we get a palindrome (69524642596).

The spelling of 15521330045 in words is "fifteen billion, five hundred twenty-one million, three hundred thirty thousand, forty-five".