651631142 has 16 divisors (see below), whose sum is σ = 996602400. Its totient is φ = 319482432.

The previous prime is 651631117. The next prime is 651631217. The reversal of 651631142 is 241136156.

It is a happy number.

651631142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12359 + ... + 38157.

It is an arithmetic number, because the mean of its divisors is an integer number (62287650).

Almost surely, 2^651631142 is an apocalyptic number.

651631142 is a deficient number, since it is larger than the sum of its proper divisors (344971258).

651631142 is a wasteful number, since it uses less digits than its factorization.

651631142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26047.

The product of its digits is 4320, while the sum is 29.

The square root of 651631142 is about 25527.0668506979. The cubic root of 651631142 is about 866.9630944258.

Adding to 651631142 its reverse (241136156), we get a palindrome (892767298).

The spelling of 651631142 in words is "six hundred fifty-one million, six hundred thirty-one thousand, one hundred forty-two".