2031645330 has 144 divisors (see below), whose sum is σ = 6240364416. Its totient is φ = 454596480.

The previous prime is 2031645323. The next prime is 2031645337. The reversal of 2031645330 is 335461302.

It is a happy number.

2031645330 is a `hidden beast` number, since 203 + 1 + 6 + 453 + 3 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2031645323) and next prime (2031645337).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2031645294 and 2031645303.

It is not an unprimeable number, because it can be changed into a prime (2031645337) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 161239 + ... + 173381.

It is an arithmetic number, because the mean of its divisors is an integer number (43335864).

Almost surely, 2^2031645330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2031645330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3120182208).

2031645330 is an abundant number, since it is smaller than the sum of its proper divisors (4208719086).

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

2031645330 is a wasteful number, since it uses less digits than its factorization.

2031645330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12193 (or 12177 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 2031645330 is about 45073.7765224970. The cubic root of 2031645330 is about 1266.5314099189.

The spelling of 2031645330 in words is "two billion, thirty-one million, six hundred forty-five thousand, three hundred thirty".