1220524105440 has 96 divisors (see below), whose sum is σ = 3872310503040. Its totient is φ = 323131544064.

The previous prime is 1220524105397. The next prime is 1220524105547. The reversal of 1220524105440 is 445014250221.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1220524105440² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1220524105398 and 1220524105407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9079894 + ... + 9213333.

It is an arithmetic number, because the mean of its divisors is an integer number (40336567740).

Almost surely, 2^{1220524105440} is an apocalyptic number.

1220524105440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220524105440 is an abundant number, since it is smaller than the sum of its proper divisors (2651786397600).

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

1220524105440 is a wasteful number, since it uses less digits than its factorization.

1220524105440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18293384 (or 18293376 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 1220524105440 its reverse (445014250221), we get a palindrome (1665538355661).

The spelling of 1220524105440 in words is "one trillion, two hundred twenty billion, five hundred twenty-four million, one hundred five thousand, four hundred forty".