2151213155 has 32 divisors (see below), whose sum is σ = 3344409600. Its totient is φ = 1289976192.

The previous prime is 2151213149. The next prime is 2151213227. The reversal of 2151213155 is 5513121512.

It is a cyclic number.

It is not a de Polignac number, because 2151213155 - 2⁴ = 2151213139 is a prime.

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, 115775 + ... + 133064.

It is an arithmetic number, because the mean of its divisors is an integer number (104512800).

Almost surely, 2^2151213155 is an apocalyptic number.

2151213155 is a deficient number, since it is larger than the sum of its proper divisors (1193196445).

2151213155 is a wasteful number, since it uses less digits than its factorization.

2151213155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248883.

The product of its digits is 1500, while the sum is 26.

The square root of 2151213155 is about 46381.1724194204. The cubic root of 2151213155 is about 1290.9055907080.

Adding to 2151213155 its reverse (5513121512), we get a palindrome (7664334667).

The spelling of 2151213155 in words is "two billion, one hundred fifty-one million, two hundred thirteen thousand, one hundred fifty-five".