2155215551304 has 32 divisors (see below), whose sum is σ = 5388418026720. Its totient is φ = 718354630656.

The previous prime is 2155215551297. The next prime is 2155215551309. The reversal of 2155215551304 is 4031555125512.

It is a super-2 number, since 2×2155215551304² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2155215551309) 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, 2810617 + ... + 3494280.

It is an arithmetic number, because the mean of its divisors is an integer number (168388063335).

Almost surely, 2^{2155215551304} is an apocalyptic number.

2155215551304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2155215551304 is an abundant number, since it is smaller than the sum of its proper divisors (3233202475416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155215551304 is a wasteful number, since it uses less digits than its factorization.

2155215551304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6319149 (or 6319145 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 2155215551304 in words is "two trillion, one hundred fifty-five billion, two hundred fifteen million, five hundred fifty-one thousand, three hundred four".