34520012521 has 8 divisors (see below), whose sum is σ = 35635845888. Its totient is φ = 33404322000.

The previous prime is 34520012509. The next prime is 34520012531. The reversal of 34520012521 is 12521002543.

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

It is a cyclic number.

It is not a de Polignac number, because 34520012521 - 2⁷ = 34520012393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34520012531) 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, 689466 + ... + 737836.

It is an arithmetic number, because the mean of its divisors is an integer number (4454480736).

Almost surely, 2^34520012521 is an apocalyptic number.

34520012521 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

34520012521 is a deficient number, since it is larger than the sum of its proper divisors (1115833367).

34520012521 is a wasteful number, since it uses less digits than its factorization.

34520012521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71423.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 34520012521 in words is "thirty-four billion, five hundred twenty million, twelve thousand, five hundred twenty-one".