76527221 has 4 divisors (see below), whose sum is σ = 77496000. Its totient is φ = 75558444.

The previous prime is 76527179. The next prime is 76527239. The reversal of 76527221 is 12272567.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12272567 = 37 ⋅331691.

It is not a de Polignac number, because 76527221 - 2²² = 72332917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76527271) 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, 484271 + ... + 484428.

It is an arithmetic number, because the mean of its divisors is an integer number (19374000).

Almost surely, 2^76527221 is an apocalyptic number.

It is an amenable number.

76527221 is a deficient number, since it is larger than the sum of its proper divisors (968779).

76527221 is an equidigital number, since it uses as much as digits as its factorization.

76527221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968778.

The product of its digits is 11760, while the sum is 32.

The square root of 76527221 is about 8747.9838248593. The cubic root of 76527221 is about 424.5595825177.

Adding to 76527221 its reverse (12272567), we get a palindrome (88799788).

The spelling of 76527221 in words is "seventy-six million, five hundred twenty-seven thousand, two hundred twenty-one".