2151223145 has 8 divisors (see below), whose sum is σ = 2664741120. Its totient is φ = 1665462960.

The previous prime is 2151223127. The next prime is 2151223159. The reversal of 2151223145 is 5413221512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2151223145 is a prime.

It is a super-2 number, since 2×2151223145² = 9255522039167382050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6939275 + ... + 6939584.

It is an arithmetic number, because the mean of its divisors is an integer number (333092640).

Almost surely, 2^2151223145 is an apocalyptic number.

It is an amenable number.

2151223145 is a deficient number, since it is larger than the sum of its proper divisors (513517975).

2151223145 is a wasteful number, since it uses less digits than its factorization.

2151223145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13878895.

The product of its digits is 2400, while the sum is 26.

The square root of 2151223145 is about 46381.2801138563. The cubic root of 2151223145 is about 1290.9075889800.

Adding to 2151223145 its reverse (5413221512), we get a palindrome (7564444657).

The spelling of 2151223145 in words is "two billion, one hundred fifty-one million, two hundred twenty-three thousand, one hundred forty-five".