2151323511155 has 32 divisors (see below), whose sum is σ = 3194893822848. Its totient is φ = 1354193510400.

The previous prime is 2151323511133. The next prime is 2151323511209. The reversal of 2151323511155 is 5511153231512.

It is not a de Polignac number, because 2151323511155 - 2¹⁰ = 2151323510131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 12978926 + ... + 13143635.

It is an arithmetic number, because the mean of its divisors is an integer number (99840431964).

Almost surely, 2^{2151323511155} is an apocalyptic number.

2151323511155 is a deficient number, since it is larger than the sum of its proper divisors (1043570311693).

2151323511155 is a wasteful number, since it uses less digits than its factorization.

2151323511155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26122767.

The product of its digits is 22500, while the sum is 35.

Adding to 2151323511155 its reverse (5511153231512), we get a palindrome (7662476742667).

The spelling of 2151323511155 in words is "two trillion, one hundred fifty-one billion, three hundred twenty-three million, five hundred eleven thousand, one hundred fifty-five".