1220531426532 has 72 divisors (see below), whose sum is σ = 3437318731392. Its totient is φ = 361988683200.

The previous prime is 1220531426519. The next prime is 1220531426551. The reversal of 1220531426532 is 2356241350221.

1220531426532 is a `hidden beast` number, since 1 + 2 + 20 + 531 + 42 + 65 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32770219 + ... + 32807442.

It is an arithmetic number, because the mean of its divisors is an integer number (47740537936).

Almost surely, 2^{1220531426532} is an apocalyptic number.

1220531426532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220531426532 is an abundant number, since it is smaller than the sum of its proper divisors (2216787304860).

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

1220531426532 is a wasteful number, since it uses less digits than its factorization.

1220531426532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65577729 (or 65577724 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 1220531426532 its reverse (2356241350221), we get a palindrome (3576772776753).

The spelling of 1220531426532 in words is "one trillion, two hundred twenty billion, five hundred thirty-one million, four hundred twenty-six thousand, five hundred thirty-two".