512216401 has 2 divisors, whose sum is σ = 512216402. Its totient is φ = 512216400.

The previous prime is 512216381. The next prime is 512216413. The reversal of 512216401 is 104612215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491065600 + 21150801 = 22160^2 + 4599^2 .

It is a cyclic number.

It is not a de Polignac number, because 512216401 - 2²⁵ = 478661969 is a prime.

It is not a weakly prime, because it can be changed into another prime (512216431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256108200 + 256108201.

It is an arithmetic number, because the mean of its divisors is an integer number (256108201).

Almost surely, 2^512216401 is an apocalyptic number.

It is an amenable number.

512216401 is a deficient number, since it is larger than the sum of its proper divisors (1).

512216401 is an equidigital number, since it uses as much as digits as its factorization.

512216401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 512216401 is about 22632.1983245110. The cubic root of 512216401 is about 800.1126929788.

Adding to 512216401 its reverse (104612215), we get a palindrome (616828616).

The spelling of 512216401 in words is "five hundred twelve million, two hundred sixteen thousand, four hundred one".