651221349 has 16 divisors (see below), whose sum is σ = 897258432. Its totient is φ = 419810688.

The previous prime is 651221341. The next prime is 651221353. The reversal of 651221349 is 943122156.

651221349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 651221349 - 2³ = 651221341 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651221341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97 + ... + 36089.

It is an arithmetic number, because the mean of its divisors is an integer number (56078652).

Almost surely, 2^651221349 is an apocalyptic number.

It is an amenable number.

651221349 is a deficient number, since it is larger than the sum of its proper divisors (246037083).

651221349 is a wasteful number, since it uses less digits than its factorization.

651221349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36196.

The product of its digits is 12960, while the sum is 33.

The square root of 651221349 is about 25519.0389513398. The cubic root of 651221349 is about 866.7813198579.

The spelling of 651221349 in words is "six hundred fifty-one million, two hundred twenty-one thousand, three hundred forty-nine".