1225022251 has 16 divisors (see below), whose sum is σ = 1305043200. Its totient is φ = 1147389408.

The previous prime is 1225022243. The next prime is 1225022287. The reversal of 1225022251 is 1522205221.

It is not a de Polignac number, because 1225022251 - 2³ = 1225022243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374260 + ... + 377518.

It is an arithmetic number, because the mean of its divisors is an integer number (81565200).

Almost surely, 2^1225022251 is an apocalyptic number.

1225022251 is a deficient number, since it is larger than the sum of its proper divisors (80020949).

1225022251 is a wasteful number, since it uses less digits than its factorization.

1225022251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3618.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1225022251 is about 35000.3178699851. The cubic root of 1225022251 is about 1069.9939589725.

Adding to 1225022251 its reverse (1522205221), we get a palindrome (2747227472).

The spelling of 1225022251 in words is "one billion, two hundred twenty-five million, twenty-two thousand, two hundred fifty-one".