74150221 has 2 divisors, whose sum is σ = 74150222. Its totient is φ = 74150220.

The previous prime is 74150203. The next prime is 74150227. The reversal of 74150221 is 12205147.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74149321 + 900 = 8611^2 + 30^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74150221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74150192 and 74150201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74150227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37075110 + 37075111.

It is an arithmetic number, because the mean of its divisors is an integer number (37075111).

Almost surely, 2^74150221 is an apocalyptic number.

It is an amenable number.

74150221 is a deficient number, since it is larger than the sum of its proper divisors (1).

74150221 is an equidigital number, since it uses as much as digits as its factorization.

74150221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 74150221 is about 8611.0522585802. The cubic root of 74150221 is about 420.1175426868.

Adding to 74150221 its reverse (12205147), we get a palindrome (86355368).

The spelling of 74150221 in words is "seventy-four million, one hundred fifty thousand, two hundred twenty-one".