1251802222 has 16 divisors (see below), whose sum is σ = 2058808752. Its totient is φ = 566110720.

The previous prime is 1251802219. The next prime is 1251802229. The reversal of 1251802222 is 2222081521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251802229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140083 + ... + 148750.

It is an arithmetic number, because the mean of its divisors is an integer number (128675547).

Almost surely, 2^1251802222 is an apocalyptic number.

1251802222 is a deficient number, since it is larger than the sum of its proper divisors (807006530).

1251802222 is a wasteful number, since it uses less digits than its factorization.

1251802222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289043.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 1251802222 is about 35380.8171471491. The cubic root of 1251802222 is about 1077.7347990238.

Adding to 1251802222 its reverse (2222081521), we get a palindrome (3473883743).

The spelling of 1251802222 in words is "one billion, two hundred fifty-one million, eight hundred two thousand, two hundred twenty-two".