2151323505066 has 64 divisors (see below), whose sum is σ = 4394970316800. Its totient is φ = 701897063616.

The previous prime is 2151323505049. The next prime is 2151323505077. The reversal of 2151323505066 is 6605053231512.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45450220 + ... + 45497528.

It is an arithmetic number, because the mean of its divisors is an integer number (68671411200).

Almost surely, 2^{2151323505066} is an apocalyptic number.

2151323505066 is an abundant number, since it is smaller than the sum of its proper divisors (2243646811734).

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

2151323505066 is a wasteful number, since it uses less digits than its factorization.

2151323505066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48243.

The product of its (nonzero) digits is 162000, while the sum is 39.

Adding to 2151323505066 its reverse (6605053231512), we get a palindrome (8756376736578).

The spelling of 2151323505066 in words is "two trillion, one hundred fifty-one billion, three hundred twenty-three million, five hundred five thousand, sixty-six".