651133232021 has 8 divisors (see below), whose sum is σ = 656281789440. Its totient is φ = 645985011168.

The previous prime is 651133231913. The next prime is 651133232027. The reversal of 651133232021 is 120232331156.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 651133232021 - 2³⁴ = 633953362837 is a prime.

It is a super-2 number, since 2×651133232021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651133232027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5017070 + ... + 5145216.

It is an arithmetic number, because the mean of its divisors is an integer number (82035223680).

Almost surely, 2^651133232021 is an apocalyptic number.

It is an amenable number.

651133232021 is a deficient number, since it is larger than the sum of its proper divisors (5148557419).

651133232021 is a wasteful number, since it uses less digits than its factorization.

651133232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168283.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 651133232021 its reverse (120232331156), we get a palindrome (771365563177).

The spelling of 651133232021 in words is "six hundred fifty-one billion, one hundred thirty-three million, two hundred thirty-two thousand, twenty-one".