1215525522042 has 48 divisors (see below), whose sum is σ = 2856928674600. Its totient is φ = 371277858816.

The previous prime is 1215525522031. The next prime is 1215525522067. The reversal of 1215525522042 is 2402255255121.

1215525522042 is a `hidden beast` number, since 1 + 2 + 15 + 52 + 552 + 2 + 0 + 42 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 555712102521 + 659813419521 = 745461^2 + 812289^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1215525521988 and 1215525522006.

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, 18926167 + ... + 18990282.

Almost surely, 2^{1215525522042} is an apocalyptic number.

1215525522042 is an abundant number, since it is smaller than the sum of its proper divisors (1641403152558).

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

1215525522042 is a wasteful number, since it uses less digits than its factorization.

1215525522042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37916607 (or 37916604 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 1215525522042 in words is "one trillion, two hundred fifteen billion, five hundred twenty-five million, five hundred twenty-two thousand, forty-two".