651221480 has 64 divisors (see below), whose sum is σ = 1803392640. Its totient is φ = 206099712.

The previous prime is 651221479. The next prime is 651221489. The reversal of 651221480 is 84122156.

651221480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (651221489) 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, 85814 + ... + 93093.

It is an arithmetic number, because the mean of its divisors is an integer number (28178010).

Almost surely, 2^651221480 is an apocalyptic number.

It is an amenable number.

651221480 is an abundant number, since it is smaller than the sum of its proper divisors (1152171160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651221480 is a wasteful number, since it uses less digits than its factorization.

651221480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178938 (or 178934 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 651221480 is about 25519.0415180508. The cubic root of 651221480 is about 866.7813779786.

The spelling of 651221480 in words is "six hundred fifty-one million, two hundred twenty-one thousand, four hundred eighty".