651425447 has 4 divisors (see below), whose sum is σ = 666574920. Its totient is φ = 636275976.

The previous prime is 651425429. The next prime is 651425471. The reversal of 651425447 is 744524156.

It is a happy number.

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 651425447 - 2⁸ = 651425191 is a prime.

It is a super-2 number, since 2×651425447² = 848710225998299618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 651425447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651425947) 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 3 ways as a sum of consecutive naturals, for example, 7574672 + ... + 7574757.

It is an arithmetic number, because the mean of its divisors is an integer number (166643730).

Almost surely, 2^651425447 is an apocalyptic number.

651425447 is a deficient number, since it is larger than the sum of its proper divisors (15149473).

651425447 is a wasteful number, since it uses less digits than its factorization.

651425447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15149472.

The product of its digits is 134400, while the sum is 38.

The square root of 651425447 is about 25523.0375739252. The cubic root of 651425447 is about 866.8718624749.

The spelling of 651425447 in words is "six hundred fifty-one million, four hundred twenty-five thousand, four hundred forty-seven".