13405115145251 has 4 divisors (see below), whose sum is σ = 13406454461400. Its totient is φ = 13403775829104.

The previous prime is 13405115145239. The next prime is 13405115145269. The reversal of 13405115145251 is 15254151150431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13405115145251 - 2¹⁸ = 13405114883107 is a prime.

It is a super-2 number, since 2×13405115145251² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13405115145151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669643061 + ... + 669663078.

It is an arithmetic number, because the mean of its divisors is an integer number (3351613615350).

Almost surely, 2^{13405115145251} is an apocalyptic number.

13405115145251 is a deficient number, since it is larger than the sum of its proper divisors (1339316149).

13405115145251 is a wasteful number, since it uses less digits than its factorization.

13405115145251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339316148.

The product of its (nonzero) digits is 60000, while the sum is 38.

Adding to 13405115145251 its reverse (15254151150431), we get a palindrome (28659266295682).

The spelling of 13405115145251 in words is "thirteen trillion, four hundred five billion, one hundred fifteen million, one hundred forty-five thousand, two hundred fifty-one".