13155817451 has 8 divisors (see below), whose sum is σ = 15037883904. Its totient is φ = 11274417000.

The previous prime is 13155817447. The next prime is 13155817471. The reversal of 13155817451 is 15471855131.

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

It is not a de Polignac number, because 13155817451 - 2² = 13155817447 is a prime.

It is a super-2 number, since 2×13155817451² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13155817399 and 13155817408.

It is not an unprimeable number, because it can be changed into a prime (13155817471) 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, 123425 + ... + 203826.

It is an arithmetic number, because the mean of its divisors is an integer number (1879735488).

Almost surely, 2^13155817451 is an apocalyptic number.

13155817451 is a deficient number, since it is larger than the sum of its proper divisors (1882066453).

13155817451 is an equidigital number, since it uses as much as digits as its factorization.

13155817451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333001.

The product of its digits is 84000, while the sum is 41.

The spelling of 13155817451 in words is "thirteen billion, one hundred fifty-five million, eight hundred seventeen thousand, four hundred fifty-one".