651431401 has 2 divisors, whose sum is σ = 651431402. Its totient is φ = 651431400.

The previous prime is 651431399. The next prime is 651431413. The reversal of 651431401 is 104134156.

651431401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345216400 + 306215001 = 18580^2 + 17499^2 .

It is a cyclic number.

It is not a de Polignac number, because 651431401 - 2¹ = 651431399 is a prime.

Together with 651431399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (651431441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325715700 + 325715701.

It is an arithmetic number, because the mean of its divisors is an integer number (325715701).

Almost surely, 2^651431401 is an apocalyptic number.

It is an amenable number.

651431401 is a deficient number, since it is larger than the sum of its proper divisors (1).

651431401 is an equidigital number, since it uses as much as digits as its factorization.

651431401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 651431401 is about 25523.1542133804. The cubic root of 651431401 is about 866.8745035238.

Adding to 651431401 its reverse (104134156), we get a palindrome (755565557).

The spelling of 651431401 in words is "six hundred fifty-one million, four hundred thirty-one thousand, four hundred one".