2131223310 has 48 divisors (see below), whose sum is σ = 5690951136. Its totient is φ = 552965184.

The previous prime is 2131223291. The next prime is 2131223317. The reversal of 2131223310 is 133221312.

2131223310 is a `hidden beast` number, since 2 + 131 + 223 + 310 = 666.

It is a super-2 number, since 2×2131223310² = 9084225594174712200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131223317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 316674 + ... + 323333.

It is an arithmetic number, because the mean of its divisors is an integer number (118561482).

Almost surely, 2^2131223310 is an apocalyptic number.

2131223310 is an abundant number, since it is smaller than the sum of its proper divisors (3559727826).

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

2131223310 is a wasteful number, since it uses less digits than its factorization.

2131223310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640057 (or 640054 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2131223310 is about 46165.1742117367. The cubic root of 2131223310 is about 1286.8946217351.

Adding to 2131223310 its reverse (133221312), we get a palindrome (2264444622).

The spelling of 2131223310 in words is "two billion, one hundred thirty-one million, two hundred twenty-three thousand, three hundred ten".