2218439551 has 2 divisors, whose sum is σ = 2218439552. Its totient is φ = 2218439550.

The previous prime is 2218439537. The next prime is 2218439609. The reversal of 2218439551 is 1559348122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2218439551 - 2¹⁹ = 2217915263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218439501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109219775 + 1109219776.

It is an arithmetic number, because the mean of its divisors is an integer number (1109219776).

Almost surely, 2^2218439551 is an apocalyptic number.

2218439551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218439551 is an equidigital number, since it uses as much as digits as its factorization.

2218439551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 40.

The square root of 2218439551 is about 47100.3137038385. The cubic root of 2218439551 is about 1304.2150270115.

The spelling of 2218439551 in words is "two billion, two hundred eighteen million, four hundred thirty-nine thousand, five hundred fifty-one".