2251220506 has 8 divisors (see below), whose sum is σ = 3390285024. Its totient is φ = 1121125500.

The previous prime is 2251220483. The next prime is 2251220533. The reversal of 2251220506 is 6050221522.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241750 + ... + 2242753.

It is an arithmetic number, because the mean of its divisors is an integer number (423785628).

Almost surely, 2^2251220506 is an apocalyptic number.

2251220506 is a deficient number, since it is larger than the sum of its proper divisors (1139064518).

2251220506 is a wasteful number, since it uses less digits than its factorization.

2251220506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4484756.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2251220506 is about 47447.0284211772. The cubic root of 2251220506 is about 1310.6075898754.

The spelling of 2251220506 in words is "two billion, two hundred fifty-one million, two hundred twenty thousand, five hundred six".