2155213115401 has 8 divisors (see below), whose sum is σ = 2184320441160. Its totient is φ = 2126275512192.

The previous prime is 2155213115369. The next prime is 2155213115519. The reversal of 2155213115401 is 1045113125512.

It can be written as a sum of positive squares in 4 ways, for example, as 2246760000 + 2152966355401 = 47400^2 + 1467299^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2155213115401 - 2⁵ = 2155213115369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155213115101) 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, 42405070 + ... + 42455863.

It is an arithmetic number, because the mean of its divisors is an integer number (273040055145).

Almost surely, 2^{2155213115401} is an apocalyptic number.

It is an amenable number.

2155213115401 is a deficient number, since it is larger than the sum of its proper divisors (29107325759).

2155213115401 is a wasteful number, since it uses less digits than its factorization.

2155213115401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84861275.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 2155213115401 in words is "two trillion, one hundred fifty-five billion, two hundred thirteen million, one hundred fifteen thousand, four hundred one".