5815218401 has 2 divisors, whose sum is σ = 5815218402. Its totient is φ = 5815218400.

The previous prime is 5815218371. The next prime is 5815218439. The reversal of 5815218401 is 1048125185.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3122127376 + 2693091025 = 55876^2 + 51895^2 .

It is a cyclic number.

It is not a de Polignac number, because 5815218401 - 2¹⁰ = 5815217377 is a prime.

It is not a weakly prime, because it can be changed into another prime (5815218001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2907609200 + 2907609201.

It is an arithmetic number, because the mean of its divisors is an integer number (2907609201).

Almost surely, 2^5815218401 is an apocalyptic number.

It is an amenable number.

5815218401 is a deficient number, since it is larger than the sum of its proper divisors (1).

5815218401 is an equidigital number, since it uses as much as digits as its factorization.

5815218401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 35.

The square root of 5815218401 is about 76257.5793019946. The cubic root of 5815218401 is about 1798.2718393879.

The spelling of 5815218401 in words is "five billion, eight hundred fifteen million, two hundred eighteen thousand, four hundred one".