651212323 has 4 divisors (see below), whose sum is σ = 662249880. Its totient is φ = 640174768.

The previous prime is 651212311. The next prime is 651212383. The reversal of 651212323 is 323212156.

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 651212323 - 2¹³ = 651204131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651212383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5518690 + ... + 5518807.

It is an arithmetic number, because the mean of its divisors is an integer number (165562470).

Almost surely, 2^651212323 is an apocalyptic number.

651212323 is a deficient number, since it is larger than the sum of its proper divisors (11037557).

651212323 is a wasteful number, since it uses less digits than its factorization.

651212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11037556.

The product of its digits is 2160, while the sum is 25.

The square root of 651212323 is about 25518.8621023744. The cubic root of 651212323 is about 866.7773152777. Note that the first 3 decimals are identical.

Adding to 651212323 its reverse (323212156), we get a palindrome (974424479).

The spelling of 651212323 in words is "six hundred fifty-one million, two hundred twelve thousand, three hundred twenty-three".