1220031552530 has 64 divisors (see below), whose sum is σ = 2619092095488. Its totient is φ = 400080384000.

The previous prime is 1220031552497. The next prime is 1220031552547. The reversal of 1220031552530 is 352551300221.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220031552493 and 1220031552502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38625824 + ... + 38657396.

It is an arithmetic number, because the mean of its divisors is an integer number (40923313992).

Almost surely, 2^{1220031552530} is an apocalyptic number.

1220031552530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220031552530 is an abundant number, since it is smaller than the sum of its proper divisors (1399060542958).

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

1220031552530 is a wasteful number, since it uses less digits than its factorization.

1220031552530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55611.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 1220031552530 its reverse (352551300221), we get a palindrome (1572582852751).

The spelling of 1220031552530 in words is "one trillion, two hundred twenty billion, thirty-one million, five hundred fifty-two thousand, five hundred thirty".