651322403 has 4 divisors (see below), whose sum is σ = 651770280. Its totient is φ = 650874528.

The previous prime is 651322391. The next prime is 651322429. The reversal of 651322403 is 304223156.

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

It is a cyclic number.

It is not a de Polignac number, because 651322403 - 2⁴ = 651322387 is a prime.

It is a super-4 number, since 4×651322403⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651322453) 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 in 3 ways as a sum of consecutive naturals, for example, 221750 + ... + 224667.

It is an arithmetic number, because the mean of its divisors is an integer number (162942570).

Almost surely, 2^651322403 is an apocalyptic number.

651322403 is a deficient number, since it is larger than the sum of its proper divisors (447877).

651322403 is a wasteful number, since it uses less digits than its factorization.

651322403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447876.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 651322403 is about 25521.0188472169. The cubic root of 651322403 is about 866.8261521254.

Adding to 651322403 its reverse (304223156), we get a palindrome (955545559).

The spelling of 651322403 in words is "six hundred fifty-one million, three hundred twenty-two thousand, four hundred three".