Search a number
-
+
251513155801 is a prime number
BaseRepresentation
bin1110101000111101011…
…0100011000011011001
3220001012101101010122201
43222033112203003121
513110044331441201
6311313223450201
724112505356465
oct3521726430331
9801171333581
10251513155801
119773668a636
12408b32b6961
131a94370925b
14c25d77b4a5
156820ab1801
hex3a8f5a30d9

251513155801 has 2 divisors, whose sum is σ = 251513155802. Its totient is φ = 251513155800.

The previous prime is 251513155753. The next prime is 251513155813. The reversal of 251513155801 is 108551315152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213581698201 + 37931457600 = 462149^2 + 194760^2 .

It is a cyclic number.

It is not a de Polignac number, because 251513155801 - 223 = 251504767193 is a prime.

It is not a weakly prime, because it can be changed into another prime (251513155841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125756577900 + 125756577901.

It is an arithmetic number, because the mean of its divisors is an integer number (125756577901).

Almost surely, 2251513155801 is an apocalyptic number.

It is an amenable number.

251513155801 is a deficient number, since it is larger than the sum of its proper divisors (1).

251513155801 is an equidigital number, since it uses as much as digits as its factorization.

251513155801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30000, while the sum is 37.

The spelling of 251513155801 in words is "two hundred fifty-one billion, five hundred thirteen million, one hundred fifty-five thousand, eight hundred one".