1223167815 has 24 divisors (see below), whose sum is σ = 2122555968. Its totient is φ = 651618240.

The previous prime is 1223167789. The next prime is 1223167831. The reversal of 1223167815 is 5187613221.

It is not a de Polignac number, because 1223167815 - 2⁵ = 1223167783 is a prime.

It is a super-2 number, since 2×1223167815² = 2992279007303748450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223167815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26077 + ... + 55913.

It is an arithmetic number, because the mean of its divisors is an integer number (88439832).

Almost surely, 2^1223167815 is an apocalyptic number.

1223167815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1223167815 is a deficient number, since it is larger than the sum of its proper divisors (899388153).

1223167815 is a wasteful number, since it uses less digits than its factorization.

1223167815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30759 (or 30756 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 1223167815 is about 34973.8161343597. The cubic root of 1223167815 is about 1069.4537681305.

The spelling of 1223167815 in words is "one billion, two hundred twenty-three million, one hundred sixty-seven thousand, eight hundred fifteen".