30420523 has 6 divisors (see below), whose sum is σ = 35387196. Its totient is φ = 26074692.

The previous prime is 30420521. The next prime is 30420529. The reversal of 30420523 is 32502403.

It is not a de Polignac number, because 30420523 - 2¹ = 30420521 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 30420523.

It is not an unprimeable number, because it can be changed into a prime (30420521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 310365 + ... + 310462.

It is an arithmetic number, because the mean of its divisors is an integer number (5897866).

Almost surely, 2^30420523 is an apocalyptic number.

30420523 is a deficient number, since it is larger than the sum of its proper divisors (4966673).

30420523 is an equidigital number, since it uses as much as digits as its factorization.

30420523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620841 (or 620834 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 30420523 is about 5515.4803054675. The cubic root of 30420523 is about 312.1683666931.

Adding to 30420523 its reverse (32502403), we get a palindrome (62922926).

The spelling of 30420523 in words is "thirty million, four hundred twenty thousand, five hundred twenty-three".