13155040251 has 8 divisors (see below), whose sum is σ = 19488948560. Its totient is φ = 8770026816.

The previous prime is 13155040237. The next prime is 13155040303. The reversal of 13155040251 is 15204055131.

13155040251 is a `hidden beast` number, since 131 + 5 + 504 + 0 + 25 + 1 = 666.

It is not a de Polignac number, because 13155040251 - 2¹⁴ = 13155023867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 487223713 = 13155040251 / (1 + 3 + 1 + 5 + 5 + 0 + 4 + 0 + 2 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13155044251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243611830 + ... + 243611883.

It is an arithmetic number, because the mean of its divisors is an integer number (2436118570).

Almost surely, 2^13155040251 is an apocalyptic number.

13155040251 is a deficient number, since it is larger than the sum of its proper divisors (6333908309).

13155040251 is an equidigital number, since it uses as much as digits as its factorization.

13155040251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487223722 (or 487223716 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 13155040251 its reverse (15204055131), we get a palindrome (28359095382).

The spelling of 13155040251 in words is "thirteen billion, one hundred fifty-five million, forty thousand, two hundred fifty-one".