1220243532 has 24 divisors (see below), whose sum is σ = 2848781376. Its totient is φ = 406526928.

The previous prime is 1220243509. The next prime is 1220243567. The reversal of 1220243532 is 2353420221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3778 + ... + 49545.

It is an arithmetic number, because the mean of its divisors is an integer number (118699224).

Almost surely, 2^1220243532 is an apocalyptic number.

1220243532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220243532 is an abundant number, since it is smaller than the sum of its proper divisors (1628537844).

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

1220243532 is a wasteful number, since it uses less digits than its factorization.

1220243532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55237 (or 55235 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1220243532 is about 34931.9843696289. The cubic root of 1220243532 is about 1068.6008241023.

Adding to 1220243532 its reverse (2353420221), we get a palindrome (3573663753).

The spelling of 1220243532 in words is "one billion, two hundred twenty million, two hundred forty-three thousand, five hundred thirty-two".