1555813115213 has 8 divisors (see below), whose sum is σ = 1778130270528. Its totient is φ = 1333510494624.

The previous prime is 1555813115209. The next prime is 1555813115249. The reversal of 1555813115213 is 3125113185551.

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

It is not a de Polignac number, because 1555813115213 - 2² = 1555813115209 is a prime.

It is a super-2 number, since 2×1555813115213² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555813115413) 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, 3403331 + ... + 3833312.

It is an arithmetic number, because the mean of its divisors is an integer number (222266283816).

Almost surely, 2^{1555813115213} is an apocalyptic number.

It is an amenable number.

1555813115213 is a deficient number, since it is larger than the sum of its proper divisors (222317155315).

1555813115213 is an equidigital number, since it uses as much as digits as its factorization.

1555813115213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7267363.

The product of its digits is 90000, while the sum is 41.

The spelling of 1555813115213 in words is "one trillion, five hundred fifty-five billion, eight hundred thirteen million, one hundred fifteen thousand, two hundred thirteen".