2151223040 has 36 divisors (see below), whose sum is σ = 5152854504. Its totient is φ = 860488704.

The previous prime is 2151223037. The next prime is 2151223079. The reversal of 2151223040 is 403221512.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839042 + ... + 841601.

Almost surely, 2^2151223040 is an apocalyptic number.

2151223040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151223040 is an abundant number, since it is smaller than the sum of its proper divisors (3001631464).

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

2151223040 is an equidigital number, since it uses as much as digits as its factorization.

2151223040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680664 (or 1680650 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2151223040 is about 46381.2789819341. The cubic root of 2151223040 is about 1290.9075679771.

Adding to 2151223040 its reverse (403221512), we get a palindrome (2554444552).

The spelling of 2151223040 in words is "two billion, one hundred fifty-one million, two hundred twenty-three thousand, forty".