250216129 has 2 divisors, whose sum is σ = 250216130. Its totient is φ = 250216128.

The previous prime is 250216121. The next prime is 250216139. The reversal of 250216129 is 921612052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237776400 + 12439729 = 15420^2 + 3527^2 .

It is a cyclic number.

It is not a de Polignac number, because 250216129 - 2³ = 250216121 is a prime.

It is a super-2 number, since 2×250216129² = 125216222423489282, which contains 22 as substring.

It is equal to p_13690504 and since 250216129 and 13690504 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 250216097 and 250216106.

It is not a weakly prime, because it can be changed into another prime (250216121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125108064 + 125108065.

It is an arithmetic number, because the mean of its divisors is an integer number (125108065).

Almost surely, 2^250216129 is an apocalyptic number.

It is an amenable number.

250216129 is a deficient number, since it is larger than the sum of its proper divisors (1).

250216129 is an equidigital number, since it uses as much as digits as its factorization.

250216129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 250216129 is about 15818.2214234091. The cubic root of 250216129 is about 630.1420096431.

The spelling of 250216129 in words is "two hundred fifty million, two hundred sixteen thousand, one hundred twenty-nine".