76130221 has 2 divisors, whose sum is σ = 76130222. Its totient is φ = 76130220.

The previous prime is 76130183. The next prime is 76130227. The reversal of 76130221 is 12203167.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42432196 + 33698025 = 6514^2 + 5805^2 .

It is a cyclic number.

It is not a de Polignac number, because 76130221 - 2²³ = 67741613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76130192 and 76130201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76130227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38065110 + 38065111.

It is an arithmetic number, because the mean of its divisors is an integer number (38065111).

Almost surely, 2^76130221 is an apocalyptic number.

It is an amenable number.

76130221 is a deficient number, since it is larger than the sum of its proper divisors (1).

76130221 is an equidigital number, since it uses as much as digits as its factorization.

76130221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 76130221 is about 8725.2633771136. The cubic root of 76130221 is about 423.8241472163.

Adding to 76130221 its reverse (12203167), we get a palindrome (88333388).

The spelling of 76130221 in words is "seventy-six million, one hundred thirty thousand, two hundred twenty-one".