30531200 has 192 divisors, whose sum is σ = 91065600. Its totient is φ = 9891840.

The previous prime is 30531197. The next prime is 30531203. The reversal of 30531200 is 213503.

It is an interprime number because it is at equal distance from previous prime (30531197) and next prime (30531203).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (30531203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 649577 + ... + 649623.

It is an arithmetic number, because the mean of its divisors is an integer number (474300).

Almost surely, 2^30531200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30531200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45532800).

30531200 is an abundant number, since it is smaller than the sum of its proper divisors (60534400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30531200 is a wasteful number, since it uses less digits than its factorization.

30531200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 30531200 is about 5525.5045018532. The cubic root of 30531200 is about 312.5464890837.

Adding to 30531200 its reverse (213503), we get a palindrome (30744703).

The spelling of 30531200 in words is "thirty million, five hundred thirty-one thousand, two hundred".