51802001 has 2 divisors, whose sum is σ = 51802002. Its totient is φ = 51802000.

The previous prime is 51801979. The next prime is 51802007. The reversal of 51802001 is 10020815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50751376 + 1050625 = 7124^2 + 1025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51802001 is a prime.

It is not a weakly prime, because it can be changed into another prime (51802007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25901000 + 25901001.

It is an arithmetic number, because the mean of its divisors is an integer number (25901001).

Almost surely, 2^51802001 is an apocalyptic number.

It is an amenable number.

51802001 is a deficient number, since it is larger than the sum of its proper divisors (1).

51802001 is an equidigital number, since it uses as much as digits as its factorization.

51802001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 51802001 is about 7197.3606968110. The cubic root of 51802001 is about 372.7767737169.

Adding to 51802001 its reverse (10020815), we get a palindrome (61822816).

The spelling of 51802001 in words is "fifty-one million, eight hundred two thousand, one".