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215240449 is a prime number
BaseRepresentation
bin11001101010001…
…00111100000001
3120000000100101111
430311010330001
5420100143244
633205203321
75222341114
oct1465047401
9500010344
10215240449
11100552376
1260100541
1335792218
142082c57b
1513d69e34
hexcd44f01

215240449 has 2 divisors, whose sum is σ = 215240450. Its totient is φ = 215240448.

The previous prime is 215240429. The next prime is 215240551. The reversal of 215240449 is 944042512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112360000 + 102880449 = 10600^2 + 10143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-215240449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215240449.

It is not a weakly prime, because it can be changed into another prime (215240429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107620224 + 107620225.

It is an arithmetic number, because the mean of its divisors is an integer number (107620225).

Almost surely, 2215240449 is an apocalyptic number.

It is an amenable number.

215240449 is a deficient number, since it is larger than the sum of its proper divisors (1).

215240449 is an equidigital number, since it uses as much as digits as its factorization.

215240449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 215240449 is about 14671.0752503012. The cubic root of 215240449 is about 599.2958860662.

The spelling of 215240449 in words is "two hundred fifteen million, two hundred forty thousand, four hundred forty-nine".