651543142 has 4 divisors (see below), whose sum is σ = 977314716. Its totient is φ = 325771570.

The previous prime is 651543127. The next prime is 651543143. The reversal of 651543142 is 241345156.

It is a happy number.

651543142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651543143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162885784 + ... + 162885787.

It is an arithmetic number, because the mean of its divisors is an integer number (244328679).

Almost surely, 2^651543142 is an apocalyptic number.

651543142 is a deficient number, since it is larger than the sum of its proper divisors (325771574).

651543142 is a wasteful number, since it uses less digits than its factorization.

651543142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325771573.

The product of its digits is 14400, while the sum is 31.

The square root of 651543142 is about 25525.3431318758. The cubic root of 651543142 is about 866.9240661156.

Adding to 651543142 its reverse (241345156), we get a palindrome (892888298).

The spelling of 651543142 in words is "six hundred fifty-one million, five hundred forty-three thousand, one hundred forty-two".