221213034 has 48 divisors (see below), whose sum is σ = 571588992. Its totient is φ = 60454944.

The previous prime is 221213021. The next prime is 221213039. The reversal of 221213034 is 430312122.

It is a super-2 number, since 2×221213034² = 97870412822970312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221212998 and 221213016.

It is not an unprimeable number, because it can be changed into a prime (221213039) 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, 35269 + ... + 41064.

It is an arithmetic number, because the mean of its divisors is an integer number (11908104).

Almost surely, 2^221213034 is an apocalyptic number.

221213034 is an abundant number, since it is smaller than the sum of its proper divisors (350375958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221213034 is a wasteful number, since it uses less digits than its factorization.

221213034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76371 (or 76368 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 221213034 is about 14873.2321302399. The cubic root of 221213034 is about 604.7885644149.

Adding to 221213034 its reverse (430312122), we get a palindrome (651525156).

The spelling of 221213034 in words is "two hundred twenty-one million, two hundred thirteen thousand, thirty-four".