1520202442051 has 4 divisors (see below), whose sum is σ = 1541027133112. Its totient is φ = 1499377750992.

The previous prime is 1520202442039. The next prime is 1520202442081. The reversal of 1520202442051 is 1502442020251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1520202442051 is a prime.

It is a super-2 number, since 2×1520202442051² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1520202442081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10412345421 + ... + 10412345566.

It is an arithmetic number, because the mean of its divisors is an integer number (385256783278).

Almost surely, 2^{1520202442051} is an apocalyptic number.

1520202442051 is a deficient number, since it is larger than the sum of its proper divisors (20824691061).

1520202442051 is an equidigital number, since it uses as much as digits as its factorization.

1520202442051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20824691060.

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 1520202442051 in words is "one trillion, five hundred twenty billion, two hundred two million, four hundred forty-two thousand, fifty-one".