1213525430440 has 16 divisors (see below), whose sum is σ = 2730432218580. Its totient is φ = 485410172160.

The previous prime is 1213525430431. The next prime is 1213525430479. The reversal of 1213525430440 is 440345253121.

It can be written as a sum of positive squares in 2 ways, for example, as 1064929058116 + 148596372324 = 1031954^2 + 385482^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1213525430396 and 1213525430405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15169067841 + ... + 15169067920.

Almost surely, 2^{1213525430440} is an apocalyptic number.

1213525430440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213525430440 is an abundant number, since it is smaller than the sum of its proper divisors (1516906788140).

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

1213525430440 is a wasteful number, since it uses less digits than its factorization.

1213525430440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30338135772 (or 30338135768 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 1213525430440 in words is "one trillion, two hundred thirteen billion, five hundred twenty-five million, four hundred thirty thousand, four hundred forty".