1222553879 has 8 divisors (see below), whose sum is σ = 1287517440. Its totient is φ = 1157652216.

The previous prime is 1222553863. The next prime is 1222553897. The reversal of 1222553879 is 9783552221.

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

It is not a de Polignac number, because 1222553879 - 2⁴ = 1222553863 is a prime.

It is a super-3 number, since 3×1222553879³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222555879) 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, 28274 + ... + 56960.

It is an arithmetic number, because the mean of its divisors is an integer number (160939680).

Almost surely, 2^1222553879 is an apocalyptic number.

1222553879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1222553879 is a deficient number, since it is larger than the sum of its proper divisors (64963561).

1222553879 is a wasteful number, since it uses less digits than its factorization.

1222553879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30949.

The product of its digits is 302400, while the sum is 44.

The square root of 1222553879 is about 34965.0379522174. The cubic root of 1222553879 is about 1069.2748103888.

The spelling of 1222553879 in words is "one billion, two hundred twenty-two million, five hundred fifty-three thousand, eight hundred seventy-nine".