651138822 has 24 divisors (see below), whose sum is σ = 1411508280. Its totient is φ = 216937440.

The previous prime is 651138821. The next prime is 651138823. The reversal of 651138822 is 228831156.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (651138821) and next prime (651138823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651138821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33129 + ... + 48987.

It is an arithmetic number, because the mean of its divisors is an integer number (58812845).

Almost surely, 2^651138822 is an apocalyptic number.

651138822 is an abundant number, since it is smaller than the sum of its proper divisors (760369458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651138822 is a wasteful number, since it uses less digits than its factorization.

651138822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18148 (or 18145 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 651138822 is about 25517.4219309083. The cubic root of 651138822 is about 866.7447035912.

Adding to 651138822 its reverse (228831156), we get a palindrome (879969978).

The spelling of 651138822 in words is "six hundred fifty-one million, one hundred thirty-eight thousand, eight hundred twenty-two".