2251221443146 has 16 divisors (see below), whose sum is σ = 3636613354248. Its totient is φ = 1039018176000.

The previous prime is 2251221443131. The next prime is 2251221443161. The reversal of 2251221443146 is 6413441221522.

It is an interprime number because it is at equal distance from previous prime (2251221443131) and next prime (2251221443161).

It can be written as a sum of positive squares in 4 ways, for example, as 1716113100025 + 535108343121 = 1310005^2 + 731511^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6684066 + ... + 7012786.

Almost surely, 2^{2251221443146} is an apocalyptic number.

2251221443146 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2251221443146 is a deficient number, since it is larger than the sum of its proper divisors (1385391911102).

2251221443146 is a wasteful number, since it uses less digits than its factorization.

2251221443146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592137.

The product of its digits is 92160, while the sum is 37.

Adding to 2251221443146 its reverse (6413441221522), we get a palindrome (8664662664668).

The spelling of 2251221443146 in words is "two trillion, two hundred fifty-one billion, two hundred twenty-one million, four hundred forty-three thousand, one hundred forty-six".