45221389 has 2 divisors, whose sum is σ = 45221390. Its totient is φ = 45221388.

The previous prime is 45221347. The next prime is 45221399. The reversal of 45221389 is 98312254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41705764 + 3515625 = 6458^2 + 1875^2 .

It is a cyclic number.

It is not a de Polignac number, because 45221389 - 2¹³ = 45213197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45221399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22610694 + 22610695.

It is an arithmetic number, because the mean of its divisors is an integer number (22610695).

Almost surely, 2^45221389 is an apocalyptic number.

It is an amenable number.

45221389 is a deficient number, since it is larger than the sum of its proper divisors (1).

45221389 is an equidigital number, since it uses as much as digits as its factorization.

45221389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 45221389 is about 6724.6850483870. The cubic root of 45221389 is about 356.2716780078.

The spelling of 45221389 in words is "forty-five million, two hundred twenty-one thousand, three hundred eighty-nine".