7505307021 has 8 divisors (see below), whose sum is σ = 10533764320. Its totient is φ = 4740193872.

The previous prime is 7505307013. The next prime is 7505307023. The reversal of 7505307021 is 1207035057.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7505307021 - 2³ = 7505307013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7505307021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7505307023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65835970 + ... + 65836083.

It is an arithmetic number, because the mean of its divisors is an integer number (1316720540).

Almost surely, 2^7505307021 is an apocalyptic number.

It is an amenable number.

7505307021 is a deficient number, since it is larger than the sum of its proper divisors (3028457299).

7505307021 is a wasteful number, since it uses less digits than its factorization.

7505307021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131672075.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 7505307021 is about 86633.1750601350. The cubic root of 7505307021 is about 1957.8954069457.

The spelling of 7505307021 in words is "seven billion, five hundred five million, three hundred seven thousand, twenty-one".