1218465213 has 24 divisors (see below), whose sum is σ = 1892485728. Its totient is φ = 695300256.

The previous prime is 1218465211. The next prime is 1218465217. The reversal of 1218465213 is 3125648121.

It is not a de Polignac number, because 1218465213 - 2¹ = 1218465211 is a prime.

It is a super-2 number, since 2×1218465213² = 2969314950582270738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218465211) 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, 108270 + ... + 118992.

It is an arithmetic number, because the mean of its divisors is an integer number (78853572).

Almost surely, 2^1218465213 is an apocalyptic number.

It is an amenable number.

1218465213 is a deficient number, since it is larger than the sum of its proper divisors (674020515).

1218465213 is a wasteful number, since it uses less digits than its factorization.

1218465213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11513 (or 11506 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 1218465213 is about 34906.5210669869. The cubic root of 1218465213 is about 1068.0814641040.

The spelling of 1218465213 in words is "one billion, two hundred eighteen million, four hundred sixty-five thousand, two hundred thirteen".