2151323455320 has 192 divisors, whose sum is σ = 7925928847200. Its totient is φ = 501685125120.

The previous prime is 2151323455279. The next prime is 2151323455357. The reversal of 2151323455320 is 235543231512.

2151323455320 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 323 + 4 + 5 + 5 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12008041 + ... + 12185880.

Almost surely, 2^{2151323455320} is an apocalyptic number.

2151323455320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151323455320 is an abundant number, since it is smaller than the sum of its proper divisors (5774605391880).

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

2151323455320 is a wasteful number, since it uses less digits than its factorization.

2151323455320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24193970 (or 24193963 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 2151323455320 its reverse (235543231512), we get a palindrome (2386866686832).

The spelling of 2151323455320 in words is "two trillion, one hundred fifty-one billion, three hundred twenty-three million, four hundred fifty-five thousand, three hundred twenty".