71772241 has 4 divisors (see below), whose sum is σ = 71863092. Its totient is φ = 71681392.

The previous prime is 71772227. The next prime is 71772247. The reversal of 71772241 is 14227717.

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 35820225 + 35952016 = 5985^2 + 5996^2 .

It is a cyclic number.

It is not a de Polignac number, because 71772241 - 2¹⁷ = 71641169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71772247) 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, 44230 + ... + 45823.

It is an arithmetic number, because the mean of its divisors is an integer number (17965773).

Almost surely, 2^71772241 is an apocalyptic number.

It is an amenable number.

71772241 is a deficient number, since it is larger than the sum of its proper divisors (90851).

71772241 is an equidigital number, since it uses as much as digits as its factorization.

71772241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90850.

The product of its digits is 5488, while the sum is 31.

The square root of 71772241 is about 8471.8499160455. The cubic root of 71772241 is about 415.5776366101.

Adding to 71772241 its reverse (14227717), we get a palindrome (85999958).

The spelling of 71772241 in words is "seventy-one million, seven hundred seventy-two thousand, two hundred forty-one".