30723225 has 24 divisors (see below), whose sum is σ = 54704832. Its totient is φ = 15124800.

The previous prime is 30723221. The next prime is 30723229. The reversal of 30723225 is 52232703.

It is an interprime number because it is at equal distance from previous prime (30723221) and next prime (30723229).

It is not a de Polignac number, because 30723225 - 2² = 30723221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30723195 and 30723204.

It is not an unprimeable number, because it can be changed into a prime (30723221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14781 + ... + 16730.

It is an arithmetic number, because the mean of its divisors is an integer number (2279368).

Almost surely, 2^30723225 is an apocalyptic number.

It is an amenable number.

30723225 is a deficient number, since it is larger than the sum of its proper divisors (23981607).

30723225 is a wasteful number, since it uses less digits than its factorization.

30723225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31537 (or 31532 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 30723225 is about 5542.8535069944. The cubic root of 30723225 is about 313.2003705004.

Adding to 30723225 its reverse (52232703), we get a palindrome (82955928).

It can be divided in two parts, 307 and 23225, that added together give a palindrome (23532).

The spelling of 30723225 in words is "thirty million, seven hundred twenty-three thousand, two hundred twenty-five".