15561050133 has 16 divisors (see below), whose sum is σ = 20959779456. Its totient is φ = 10268681280.

The previous prime is 15561050119. The next prime is 15561050143. The reversal of 15561050133 is 33105016551.

It is not a de Polignac number, because 15561050133 - 2⁴ = 15561050117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15561050133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15561050143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61063 + ... + 186683.

It is an arithmetic number, because the mean of its divisors is an integer number (1309986216).

Almost surely, 2^15561050133 is an apocalyptic number.

It is an amenable number.

15561050133 is a deficient number, since it is larger than the sum of its proper divisors (5398729323).

15561050133 is a wasteful number, since it uses less digits than its factorization.

15561050133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126044.

The product of its (nonzero) digits is 6750, while the sum is 30.

Adding to 15561050133 its reverse (33105016551), we get a palindrome (48666066684).

The spelling of 15561050133 in words is "fifteen billion, five hundred sixty-one million, fifty thousand, one hundred thirty-three".