15533120425 has 12 divisors (see below), whose sum is σ = 19269035676. Its totient is φ = 12421356800.

The previous prime is 15533120423. The next prime is 15533120501. The reversal of 15533120425 is 52402133551.

It can be written as a sum of positive squares in 6 ways, for example, as 712249344 + 14820871081 = 26688^2 + 121741^2 .

It is not a de Polignac number, because 15533120425 - 2¹ = 15533120423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15533120423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66244 + ... + 188293.

It is an arithmetic number, because the mean of its divisors is an integer number (1605752973).

Almost surely, 2^15533120425 is an apocalyptic number.

It is an amenable number.

15533120425 is a deficient number, since it is larger than the sum of its proper divisors (3735915251).

15533120425 is a wasteful number, since it uses less digits than its factorization.

15533120425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256988 (or 256983 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 15533120425 its reverse (52402133551), we get a palindrome (67935253976).

The spelling of 15533120425 in words is "fifteen billion, five hundred thirty-three million, one hundred twenty thousand, four hundred twenty-five".