2161626247 has 16 divisors (see below), whose sum is σ = 2462947200. Its totient is φ = 1879575840.

The previous prime is 2161626239. The next prime is 2161626251. The reversal of 2161626247 is 7426261612.

It is a cyclic number.

It is not a de Polignac number, because 2161626247 - 2³ = 2161626239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161626547) 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, 20997 + ... + 69022.

It is an arithmetic number, because the mean of its divisors is an integer number (153934200).

Almost surely, 2^2161626247 is an apocalyptic number.

2161626247 is a deficient number, since it is larger than the sum of its proper divisors (301320953).

2161626247 is a wasteful number, since it uses less digits than its factorization.

2161626247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90126.

The product of its digits is 48384, while the sum is 37.

The square root of 2161626247 is about 46493.2924947244. The cubic root of 2161626247 is about 1292.9851440220.

Adding to 2161626247 its reverse (7426261612), we get a palindrome (9587887859).

The spelling of 2161626247 in words is "two billion, one hundred sixty-one million, six hundred twenty-six thousand, two hundred forty-seven".