420163501 has 4 divisors (see below), whose sum is σ = 423186400. Its totient is φ = 417140604.

The previous prime is 420163487. The next prime is 420163507. The reversal of 420163501 is 105361024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420163501 - 2¹¹ = 420161453 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420163507) 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, 1511241 + ... + 1511518.

It is an arithmetic number, because the mean of its divisors is an integer number (105796600).

Almost surely, 2^420163501 is an apocalyptic number.

It is an amenable number.

420163501 is a deficient number, since it is larger than the sum of its proper divisors (3022899).

420163501 is a wasteful number, since it uses less digits than its factorization.

420163501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022898.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 420163501 is about 20497.8901597213. The cubic root of 420163501 is about 748.9844037434.

The spelling of 420163501 in words is "four hundred twenty million, one hundred sixty-three thousand, five hundred one".