45221629 has 2 divisors, whose sum is σ = 45221630. Its totient is φ = 45221628.

The previous prime is 45221621. The next prime is 45221651. The reversal of 45221629 is 92612254.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29181604 + 16040025 = 5402^2 + 4005^2 .

It is a cyclic number.

It is not a de Polignac number, because 45221629 - 2³ = 45221621 is a prime.

It is equal to p_2730748 and since 45221629 and 2730748 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45221629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45221621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22610814 + 22610815.

It is an arithmetic number, because the mean of its divisors is an integer number (22610815).

Almost surely, 2^45221629 is an apocalyptic number.

It is an amenable number.

45221629 is a deficient number, since it is larger than the sum of its proper divisors (1).

45221629 is an equidigital number, since it uses as much as digits as its factorization.

45221629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 45221629 is about 6724.7028930652. The cubic root of 45221629 is about 356.2723082778.

The spelling of 45221629 in words is "forty-five million, two hundred twenty-one thousand, six hundred twenty-nine".