651801041 has 4 divisors (see below), whose sum is σ = 653349684. Its totient is φ = 650252400.

The previous prime is 651801037. The next prime is 651801047. The reversal of 651801041 is 140108156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46444225 + 605356816 = 6815^2 + 24604^2 .

It is a cyclic number.

It is not a de Polignac number, because 651801041 - 2² = 651801037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 651801041.

It is not an unprimeable number, because it can be changed into a prime (651801047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773690 + ... + 774531.

It is an arithmetic number, because the mean of its divisors is an integer number (163337421).

Almost surely, 2^651801041 is an apocalyptic number.

It is an amenable number.

651801041 is a deficient number, since it is larger than the sum of its proper divisors (1548643).

651801041 is a wasteful number, since it uses less digits than its factorization.

651801041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548642.

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

The square root of 651801041 is about 25530.3944544537. The cubic root of 651801041 is about 867.0384352915.

Adding to 651801041 its reverse (140108156), we get a palindrome (791909197).

The spelling of 651801041 in words is "six hundred fifty-one million, eight hundred one thousand, forty-one".