651380234 has 4 divisors (see below), whose sum is σ = 977070354. Its totient is φ = 325690116.

The previous prime is 651380221. The next prime is 651380239. The reversal of 651380234 is 432083156.

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

It can be written as a sum of positive squares in only one way, i.e., 364924609 + 286455625 = 19103^2 + 16925^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 651380234.

It is not an unprimeable number, because it can be changed into a prime (651380239) 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 as a sum of consecutive naturals, namely, 162845057 + ... + 162845060.

Almost surely, 2^651380234 is an apocalyptic number.

651380234 is a deficient number, since it is larger than the sum of its proper divisors (325690120).

651380234 is a wasteful number, since it uses less digits than its factorization.

651380234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325690119.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 651380234 is about 25522.1518293423. The cubic root of 651380234 is about 866.8518065680.

The spelling of 651380234 in words is "six hundred fifty-one million, three hundred eighty thousand, two hundred thirty-four".