1222243042545 has 64 divisors (see below), whose sum is σ = 2483788032000. Its totient is φ = 558627046848.

The previous prime is 1222243042541. The next prime is 1222243042561. The reversal of 1222243042545 is 5452403422221.

1222243042545 is a `hidden beast` number, since 1 + 2 + 2 + 224 + 3 + 0 + 425 + 4 + 5 = 666.

It is not a de Polignac number, because 1222243042545 - 2² = 1222243042541 is a prime.

It is a super-3 number, since 3×1222243042545³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1222243042541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4652926 + ... + 4908584.

It is an arithmetic number, because the mean of its divisors is an integer number (38809188000).

Almost surely, 2^{1222243042545} is an apocalyptic number.

1222243042545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222243042545 is an abundant number, since it is smaller than the sum of its proper divisors (1261544989455).

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

1222243042545 is a wasteful number, since it uses less digits than its factorization.

1222243042545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260739 (or 260733 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 1222243042545 its reverse (5452403422221), we get a palindrome (6674646464766).

The spelling of 1222243042545 in words is "one trillion, two hundred twenty-two billion, two hundred forty-three million, forty-two thousand, five hundred forty-five".