4051321040 has 80 divisors (see below), whose sum is σ = 10359836928. Its totient is φ = 1464027648.

The previous prime is 4051321019. The next prime is 4051321049. The reversal of 4051321040 is 401231504.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4051321049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7439 + ... + 90321.

Almost surely, 2^4051321040 is an apocalyptic number.

4051321040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4051321040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5179918464).

4051321040 is an abundant number, since it is smaller than the sum of its proper divisors (6308515888).

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

4051321040 is a wasteful number, since it uses less digits than its factorization.

4051321040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82956 (or 82950 counting only the distinct ones).

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

The square root of 4051321040 is about 63649.9885310280. The cubic root of 4051321040 is about 1594.1611453629.

Adding to 4051321040 its reverse (401231504), we get a palindrome (4452552544).

The spelling of 4051321040 in words is "four billion, fifty-one million, three hundred twenty-one thousand, forty".