2251618 has 8 divisors (see below), whose sum is σ = 3493980. Its totient is φ = 1086960.

The previous prime is 2251603. The next prime is 2251637. The reversal of 2251618 is 8161522.

It can be written as a sum of positive squares in 2 ways, for example, as 2241009 + 10609 = 1497^2 + 103^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2251592 and 2251601.

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, 19353 + ... + 19468.

2^2251618 is an apocalyptic number.

2251618 is a deficient number, since it is larger than the sum of its proper divisors (1242362).

2251618 is a wasteful number, since it uses less digits than its factorization.

2251618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38852.

The product of its digits is 960, while the sum is 25.

The square root of 2251618 is about 1500.5392364080. The cubic root of 2251618 is about 131.0684722553.

The spelling of 2251618 in words is "two million, two hundred fifty-one thousand, six hundred eighteen".