420450221025515 has 16 divisors (see below), whose sum is σ = 509186947925376. Its totient is φ = 333264513792000.

The previous prime is 420450221025427. The next prime is 420450221025533. The reversal of 420450221025515 is 515520122054024.

It is not a de Polignac number, because 420450221025515 - 2³² = 420445926058219 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131255651 + ... + 134420780.

It is an arithmetic number, because the mean of its divisors is an integer number (31824184245336).

Almost surely, 2^{420450221025515} is an apocalyptic number.

420450221025515 is a deficient number, since it is larger than the sum of its proper divisors (88736726899861).

420450221025515 is a wasteful number, since it uses less digits than its factorization.

420450221025515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265679350.

The product of its (nonzero) digits is 160000, while the sum is 38.

Adding to 420450221025515 its reverse (515520122054024), we get a palindrome (935970343079539).

The spelling of 420450221025515 in words is "four hundred twenty trillion, four hundred fifty billion, two hundred twenty-one million, twenty-five thousand, five hundred fifteen".