4215620161 has 4 divisors (see below), whose sum is σ = 4216459824. Its totient is φ = 4214780500.

The previous prime is 4215620137. The next prime is 4215620221. The reversal of 4215620161 is 1610265124.

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 4215620161 - 2¹³ = 4215611969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4215620131) 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, 412255 + ... + 422356.

It is an arithmetic number, because the mean of its divisors is an integer number (1054114956).

Almost surely, 2^4215620161 is an apocalyptic number.

It is an amenable number.

4215620161 is a deficient number, since it is larger than the sum of its proper divisors (839663).

4215620161 is an equidigital number, since it uses as much as digits as its factorization.

4215620161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839662.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 4215620161 is about 64927.8073016485. The cubic root of 4215620161 is about 1615.4263314837.

Adding to 4215620161 its reverse (1610265124), we get a palindrome (5825885285).

The spelling of 4215620161 in words is "four billion, two hundred fifteen million, six hundred twenty thousand, one hundred sixty-one".