1213225995 has 16 divisors (see below), whose sum is σ = 2055348000. Its totient is φ = 608991744.

The previous prime is 1213225973. The next prime is 1213225997. The reversal of 1213225995 is 5995223121.

It is not a de Polignac number, because 1213225995 - 2⁵ = 1213225963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213225997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2378620 + ... + 2379129.

It is an arithmetic number, because the mean of its divisors is an integer number (128459250).

Almost surely, 2^1213225995 is an apocalyptic number.

1213225995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213225995 is a deficient number, since it is larger than the sum of its proper divisors (842122005).

1213225995 is a wasteful number, since it uses less digits than its factorization.

1213225995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4757774.

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

The square root of 1213225995 is about 34831.3938136274. The cubic root of 1213225995 is about 1066.5484012217.

The spelling of 1213225995 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, nine hundred ninety-five".