1213229955 has 48 divisors (see below), whose sum is σ = 2269085184. Its totient is φ = 551920320.

The previous prime is 1213229891. The next prime is 1213229957. The reversal of 1213229955 is 5599223121.

It is not a de Polignac number, because 1213229955 - 2⁶ = 1213229891 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1213229957) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151174 + ... + 158996.

It is an arithmetic number, because the mean of its divisors is an integer number (47272608).

Almost surely, 2^1213229955 is an apocalyptic number.

1213229955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213229955 is a deficient number, since it is larger than the sum of its proper divisors (1055855229).

1213229955 is a wasteful number, since it uses less digits than its factorization.

1213229955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8056 (or 8049 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 1213229955 is about 34831.4506588514. The cubic root of 1213229955 is about 1066.5495616340.

The spelling of 1213229955 in words is "one billion, two hundred thirteen million, two hundred twenty-nine thousand, nine hundred fifty-five".