1225721822 has 8 divisors (see below), whose sum is σ = 1980012216. Its totient is φ = 565717752.

The previous prime is 1225721821. The next prime is 1225721869. The reversal of 1225721822 is 2281275221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225721821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23571548 + ... + 23571599.

It is an arithmetic number, because the mean of its divisors is an integer number (247501527).

Almost surely, 2^1225721822 is an apocalyptic number.

1225721822 is a deficient number, since it is larger than the sum of its proper divisors (754290394).

1225721822 is a wasteful number, since it uses less digits than its factorization.

1225721822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47143162.

The product of its digits is 8960, while the sum is 32.

The square root of 1225721822 is about 35010.3102242754. The cubic root of 1225721822 is about 1070.1975999812.

The spelling of 1225721822 in words is "one billion, two hundred twenty-five million, seven hundred twenty-one thousand, eight hundred twenty-two".