13404040251 has 32 divisors (see below), whose sum is σ = 21039223296. Its totient is φ = 7431264000.

The previous prime is 13404040231. The next prime is 13404040253. The reversal of 13404040251 is 15204040431.

It is not a de Polignac number, because 13404040251 - 2¹⁵ = 13404007483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13404040253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112836 + ... + 198846.

It is an arithmetic number, because the mean of its divisors is an integer number (657475728).

Almost surely, 2^13404040251 is an apocalyptic number.

13404040251 is a deficient number, since it is larger than the sum of its proper divisors (7635183045).

13404040251 is a wasteful number, since it uses less digits than its factorization.

13404040251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86243.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 13404040251 its reverse (15204040431), we get a palindrome (28608080682).

The spelling of 13404040251 in words is "thirteen billion, four hundred four million, forty thousand, two hundred fifty-one".