1220431524 has 24 divisors (see below), whose sum is σ = 3066725760. Its totient is φ = 375517344.

The previous prime is 1220431523. The next prime is 1220431549. The reversal of 1220431524 is 4251340221.

It is a junction number, because it is equal to n+sod(n) for n = 1220431494 and 1220431503.

It is not an unprimeable number, because it can be changed into a prime (1220431523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3911484 + ... + 3911795.

It is an arithmetic number, because the mean of its divisors is an integer number (127780240).

Almost surely, 2^1220431524 is an apocalyptic number.

It is an amenable number.

1220431524 is an abundant number, since it is smaller than the sum of its proper divisors (1846294236).

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

1220431524 is a wasteful number, since it uses less digits than its factorization.

1220431524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7823299 (or 7823297 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1220431524 is about 34934.6750950971. The cubic root of 1220431524 is about 1068.6556978728.

Adding to 1220431524 its reverse (4251340221), we get a palindrome (5471771745).

The spelling of 1220431524 in words is "one billion, two hundred twenty million, four hundred thirty-one thousand, five hundred twenty-four".