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1215054149 is a prime number
BaseRepresentation
bin100100001101100…
…0100000101000101
310010200100010221112
41020123010011011
54442023213044
6320322454405
742052534631
oct11033040505
93120303845
101215054149
11573959191
1229ab04405
1316496566a
14b752bdc1
1571a1109e
hex486c4145

1215054149 has 2 divisors, whose sum is σ = 1215054150. Its totient is φ = 1215054148.

The previous prime is 1215054119. The next prime is 1215054157. The reversal of 1215054149 is 9414505121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1157020225 + 58033924 = 34015^2 + 7618^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215054149 - 216 = 1214988613 is a prime.

It is a super-2 number, since 2×12150541492 = 2952713170004228402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215054119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607527074 + 607527075.

It is an arithmetic number, because the mean of its divisors is an integer number (607527075).

Almost surely, 21215054149 is an apocalyptic number.

It is an amenable number.

1215054149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215054149 is an equidigital number, since it uses as much as digits as its factorization.

1215054149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1215054149 is about 34857.6268411950. The cubic root of 1215054149 is about 1067.0838431457.

The spelling of 1215054149 in words is "one billion, two hundred fifteen million, fifty-four thousand, one hundred forty-nine".