651108401 has 2 divisors, whose sum is σ = 651108402. Its totient is φ = 651108400.

The previous prime is 651108361. The next prime is 651108421. The reversal of 651108401 is 104801156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 449440000 + 201668401 = 21200^2 + 14201^2 .

It is a cyclic number.

It is not a de Polignac number, because 651108401 - 2¹⁴ = 651092017 is a prime.

It is not a weakly prime, because it can be changed into another prime (651108421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325554200 + 325554201.

It is an arithmetic number, because the mean of its divisors is an integer number (325554201).

Almost surely, 2^651108401 is an apocalyptic number.

It is an amenable number.

651108401 is a deficient number, since it is larger than the sum of its proper divisors (1).

651108401 is an equidigital number, since it uses as much as digits as its factorization.

651108401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 651108401 is about 25516.8258410015. The cubic root of 651108401 is about 866.7312053681.

Adding to 651108401 its reverse (104801156), we get a palindrome (755909557).

The spelling of 651108401 in words is "six hundred fifty-one million, one hundred eight thousand, four hundred one".