1223197915 has 16 divisors (see below), whose sum is σ = 1481760000. Its totient is φ = 969309792.

The previous prime is 1223197901. The next prime is 1223197919. The reversal of 1223197915 is 5197913221.

It is a cyclic number.

It is not a de Polignac number, because 1223197915 - 2⁵ = 1223197883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223197919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347836 + ... + 351334.

It is an arithmetic number, because the mean of its divisors is an integer number (92610000).

Almost surely, 2^1223197915 is an apocalyptic number.

1223197915 is a deficient number, since it is larger than the sum of its proper divisors (258562085).

1223197915 is a wasteful number, since it uses less digits than its factorization.

1223197915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4146.

The product of its digits is 34020, while the sum is 40.

The square root of 1223197915 is about 34974.2464536407. The cubic root of 1223197915 is about 1069.4625405147.

The spelling of 1223197915 in words is "one billion, two hundred twenty-three million, one hundred ninety-seven thousand, nine hundred fifteen".