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45212521 is a prime number
BaseRepresentation
bin1010110001111…
…0001101101001
310011002000220211
42230132031221
543033300041
64253021121
71056204634
oct254361551
9104060824
1045212521
1123580922
12131847a1
1394a0293
14600cc1b
153e81481
hex2b1e369

45212521 has 2 divisors, whose sum is σ = 45212522. Its totient is φ = 45212520.

The previous prime is 45212513. The next prime is 45212527. The reversal of 45212521 is 12521254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31809600 + 13402921 = 5640^2 + 3661^2 .

It is a cyclic number.

It is not a de Polignac number, because 45212521 - 23 = 45212513 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 45212492 and 45212501.

It is not a weakly prime, because it can be changed into another prime (45212527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22606260 + 22606261.

It is an arithmetic number, because the mean of its divisors is an integer number (22606261).

Almost surely, 245212521 is an apocalyptic number.

It is an amenable number.

45212521 is a deficient number, since it is larger than the sum of its proper divisors (1).

45212521 is an equidigital number, since it uses as much as digits as its factorization.

45212521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800, while the sum is 22.

The square root of 45212521 is about 6724.0256543235. The cubic root of 45212521 is about 356.2483879685.

Adding to 45212521 its reverse (12521254), we get a palindrome (57733775).

The spelling of 45212521 in words is "forty-five million, two hundred twelve thousand, five hundred twenty-one".