30213023 has 4 divisors (see below), whose sum is σ = 30949968. Its totient is φ = 29476080.

The previous prime is 30213013. The next prime is 30213037. The reversal of 30213023 is 32031203.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30213023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30212989 and 30213007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30213013) 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, 368411 + ... + 368492.

It is an arithmetic number, because the mean of its divisors is an integer number (7737492).

Almost surely, 2^30213023 is an apocalyptic number.

30213023 is a deficient number, since it is larger than the sum of its proper divisors (736945).

30213023 is an equidigital number, since it uses as much as digits as its factorization.

30213023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736944.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 30213023 is about 5496.6374266455. The cubic root of 30213023 is about 311.4569744256.

Adding to 30213023 its reverse (32031203), we get a palindrome (62244226).

The spelling of 30213023 in words is "thirty million, two hundred thirteen thousand, twenty-three".