2251220560306 has 4 divisors (see below), whose sum is σ = 3376830840462. Its totient is φ = 1125610280152.

The previous prime is 2251220560283. The next prime is 2251220560313. The reversal of 2251220560306 is 6030650221522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1137509704681 + 1113710855625 = 1066541^2 + 1055325^2 .

It is a super-2 number, since 2×2251220560306² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562805140075 + ... + 562805140078.

Almost surely, 2^{2251220560306} is an apocalyptic number.

2251220560306 is a deficient number, since it is larger than the sum of its proper divisors (1125610280156).

2251220560306 is a wasteful number, since it uses less digits than its factorization.

2251220560306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125610280155.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 2251220560306 its reverse (6030650221522), we get a palindrome (8281870781828).

The spelling of 2251220560306 in words is "two trillion, two hundred fifty-one billion, two hundred twenty million, five hundred sixty thousand, three hundred six".