30520439401 has 9 divisors (see below), whose sum is σ = 31290339909. Its totient is φ = 29769050400.

The previous prime is 30520439387. The next prime is 30520439413. The reversal of 30520439401 is 10493402503.

The square root of 30520439401 is 174701.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 42263001 + 30478176400 = 6501^2 + 174580^2 .

It is not a de Polignac number, because 30520439401 - 2⁹ = 30520438889 is a prime.

It is a super-2 number, since 2×30520439401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30520439441) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7160611 + ... + 7164871.

Almost surely, 2^30520439401 is an apocalyptic number.

30520439401 is the 174701-st square number.

30520439401 is the 87351-st centered octagonal number.

It is an amenable number.

30520439401 is a deficient number, since it is larger than the sum of its proper divisors (769900508).

30520439401 is an frugal number, since it uses more digits than its factorization.

30520439401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8604 (or 4302 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 30520439401 in words is "thirty billion, five hundred twenty million, four hundred thirty-nine thousand, four hundred one".