1520350434225 has 72 divisors (see below), whose sum is σ = 3134849952000. Its totient is φ = 689944124160.

The previous prime is 1520350434209. The next prime is 1520350434257. The reversal of 1520350434225 is 5224340530251.

1520350434225 is a `hidden beast` number, since 1 + 52 + 0 + 350 + 4 + 34 + 225 = 666.

It is not a de Polignac number, because 1520350434225 - 2⁴ = 1520350434209 is a prime.

It is a super-2 number, since 2×1520350434225² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1520350434225.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3307225 + ... + 3738774.

Almost surely, 2^{1520350434225} is an apocalyptic number.

1520350434225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1520350434225 is an abundant number, since it is smaller than the sum of its proper divisors (1614499517775).

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

1520350434225 is a wasteful number, since it uses less digits than its factorization.

1520350434225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7046159 (or 7046151 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 1520350434225 its reverse (5224340530251), we get a palindrome (6744690964476).

The spelling of 1520350434225 in words is "one trillion, five hundred twenty billion, three hundred fifty million, four hundred thirty-four thousand, two hundred twenty-five".