15501231145 has 8 divisors (see below), whose sum is σ = 18602915400. Its totient is φ = 12400026240.

The previous prime is 15501231139. The next prime is 15501231173. The reversal of 15501231145 is 54113210551.

It can be written as a sum of positive squares in 4 ways, for example, as 3847596841 + 11653634304 = 62029^2 + 107952^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15501231145 - 2⁵ = 15501231113 is a prime.

It is a super-2 number, since 2×15501231145² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44370 + ... + 181579.

It is an arithmetic number, because the mean of its divisors is an integer number (2325364425).

Almost surely, 2^15501231145 is an apocalyptic number.

It is an amenable number.

15501231145 is a deficient number, since it is larger than the sum of its proper divisors (3101684255).

15501231145 is a wasteful number, since it uses less digits than its factorization.

15501231145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239675.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 15501231145 its reverse (54113210551), we get a palindrome (69614441696).

The spelling of 15501231145 in words is "fifteen billion, five hundred one million, two hundred thirty-one thousand, one hundred forty-five".