1520211442045 has 16 divisors (see below), whose sum is σ = 1840149762048. Its totient is φ = 1205587756800.

The previous prime is 1520211441977. The next prime is 1520211442049. The reversal of 1520211442045 is 5402441120251.

It is not a de Polignac number, because 1520211442045 - 2²¹ = 1520209344893 is a prime.

It is a super-2 number, since 2×1520211442045² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1520211441998 and 1520211442016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520211442049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234049 + ... + 1759318.

It is an arithmetic number, because the mean of its divisors is an integer number (115009360128).

Almost surely, 2^{1520211442045} is an apocalyptic number.

It is an amenable number.

1520211442045 is a deficient number, since it is larger than the sum of its proper divisors (319938320003).

1520211442045 is a wasteful number, since it uses less digits than its factorization.

1520211442045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994700.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 1520211442045 its reverse (5402441120251), we get a palindrome (6922652562296).

The spelling of 1520211442045 in words is "one trillion, five hundred twenty billion, two hundred eleven million, four hundred forty-two thousand, forty-five".