40226161 has 4 divisors (see below), whose sum is σ = 41613300. Its totient is φ = 38839024.

The previous prime is 40226159. The next prime is 40226167. The reversal of 40226161 is 16162204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7952400 + 32273761 = 2820^2 + 5681^2 .

It is a cyclic number.

It is not a de Polignac number, because 40226161 - 2¹ = 40226159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40226167) 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, 693526 + ... + 693583.

It is an arithmetic number, because the mean of its divisors is an integer number (10403325).

Almost surely, 2^40226161 is an apocalyptic number.

It is an amenable number.

40226161 is a deficient number, since it is larger than the sum of its proper divisors (1387139).

40226161 is a wasteful number, since it uses less digits than its factorization.

40226161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387138.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 40226161 is about 6342.4097155576. The cubic root of 40226161 is about 342.6385281533.

Adding to 40226161 its reverse (16162204), we get a palindrome (56388365).

The spelling of 40226161 in words is "forty million, two hundred twenty-six thousand, one hundred sixty-one".