30531042 has 12 divisors (see below), whose sum is σ = 66150630. Its totient is φ = 10177008.

The previous prime is 30531037. The next prime is 30531047. The reversal of 30531042 is 24013503.

It is an interprime number because it is at equal distance from previous prime (30531037) and next prime (30531047).

It can be written as a sum of positive squares in only one way, i.e., 20169081 + 10361961 = 4491^2 + 3219^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1696169 = 30531042 / (3 + 0 + 5 + 3 + 1 + 0 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (30531047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 848067 + ... + 848102.

Almost surely, 2^30531042 is an apocalyptic number.

30531042 is an abundant number, since it is smaller than the sum of its proper divisors (35619588).

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

30531042 is a wasteful number, since it uses less digits than its factorization.

30531042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696177 (or 1696174 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30531042 is about 5525.4902044977. The cubic root of 30531042 is about 312.5459499365.

Adding to 30531042 its reverse (24013503), we get a palindrome (54544545).

It can be divided in two parts, 3053 and 1042, that added together give a triangular number (4095 = T₉₀).

The spelling of 30531042 in words is "thirty million, five hundred thirty-one thousand, forty-two".