1228215213 has 24 divisors (see below), whose sum is σ = 1807228800. Its totient is φ = 803562624.

The previous prime is 1228215187. The next prime is 1228215217. The reversal of 1228215213 is 3125128221.

It is not a de Polignac number, because 1228215213 - 2⁵ = 1228215181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228215217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 380181 + ... + 383397.

It is an arithmetic number, because the mean of its divisors is an integer number (75301200).

Almost surely, 2^1228215213 is an apocalyptic number.

It is an amenable number.

1228215213 is a deficient number, since it is larger than the sum of its proper divisors (579013587).

1228215213 is a wasteful number, since it uses less digits than its factorization.

1228215213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001 (or 3998 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1228215213 is about 35045.9015150131. The cubic root of 1228215213 is about 1070.9227818484.

It can be divided in two parts, 12282 and 15213, that added together give a triangular number (27495 = T₂₃₄).

The spelling of 1228215213 in words is "one billion, two hundred twenty-eight million, two hundred fifteen thousand, two hundred thirteen".