2151149217 has 16 divisors (see below), whose sum is σ = 3278702592. Its totient is φ = 1228942800.

The previous prime is 2151149191. The next prime is 2151149227. The reversal of 2151149217 is 7129411512.

It is not a de Polignac number, because 2151149217 - 2¹² = 2151145121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2151149227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109608 + ... + 127734.

It is an arithmetic number, because the mean of its divisors is an integer number (204918912).

Almost surely, 2^2151149217 is an apocalyptic number.

It is an amenable number.

2151149217 is a deficient number, since it is larger than the sum of its proper divisors (1127553375).

2151149217 is a wasteful number, since it uses less digits than its factorization.

2151149217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23788.

The product of its digits is 5040, while the sum is 33.

The square root of 2151149217 is about 46380.4831475482. The cubic root of 2151149217 is about 1290.8928012208.

The spelling of 2151149217 in words is "two billion, one hundred fifty-one million, one hundred forty-nine thousand, two hundred seventeen".