30421512 has 96 divisors (see below), whose sum is σ = 91316160. Its totient is φ = 9072000.

The previous prime is 30421499. The next prime is 30421513. The reversal of 30421512 is 21512403.

It is a super-2 number, since 2×30421512² = 1850936784732288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (30421513) 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, 55962 + ... + 56502.

It is an arithmetic number, because the mean of its divisors is an integer number (951210).

Almost surely, 2^30421512 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 30421512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45658080).

30421512 is an abundant number, since it is smaller than the sum of its proper divisors (60894648).

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

30421512 is a wasteful number, since it uses less digits than its factorization.

30421512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 30421512 is about 5515.5699614818. The cubic root of 30421512 is about 312.1717496195.

Adding to 30421512 its reverse (21512403), we get a palindrome (51933915).

It can be divided in two parts, 3042 and 1512, that added together give a palindrome (4554).

The spelling of 30421512 in words is "thirty million, four hundred twenty-one thousand, five hundred twelve".