30531424 has 48 divisors (see below), whose sum is σ = 74946816. Its totient is φ = 11894400.

The previous prime is 30531421. The next prime is 30531433. The reversal of 30531424 is 42413503.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 30531395 and 30531404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30531421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3732 + ... + 8659.

It is an arithmetic number, because the mean of its divisors is an integer number (1561392).

Almost surely, 2^30531424 is an apocalyptic number.

It is an amenable number.

30531424 is an abundant number, since it is smaller than the sum of its proper divisors (44415392).

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

30531424 is a wasteful number, since it uses less digits than its factorization.

30531424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12419 (or 12411 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 30531424 is about 5525.5247714584. The cubic root of 30531424 is about 312.5472534411.

Adding to 30531424 its reverse (42413503), we get a palindrome (72944927).

The spelling of 30531424 in words is "thirty million, five hundred thirty-one thousand, four hundred twenty-four".