5530123721 has 4 divisors (see below), whose sum is σ = 5634465732. Its totient is φ = 5425781712.

The previous prime is 5530123699. The next prime is 5530123741. The reversal of 5530123721 is 1273210355.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2409337225 + 3120786496 = 49085^2 + 55864^2 .

It is a cyclic number.

It is not a de Polignac number, because 5530123721 - 2¹⁸ = 5529861577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5530123741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52170926 + ... + 52171031.

It is an arithmetic number, because the mean of its divisors is an integer number (1408616433).

Almost surely, 2^5530123721 is an apocalyptic number.

It is an amenable number.

5530123721 is a deficient number, since it is larger than the sum of its proper divisors (104342011).

5530123721 is a wasteful number, since it uses less digits than its factorization.

5530123721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104342010.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 5530123721 is about 74364.8016268449. The cubic root of 5530123721 is about 1768.3909452661.

The spelling of 5530123721 in words is "five billion, five hundred thirty million, one hundred twenty-three thousand, seven hundred twenty-one".