30031440142 has 16 divisors (see below), whose sum is σ = 49194283392. Its totient is φ = 13636230520.

The previous prime is 30031440121. The next prime is 30031440149. The reversal of 30031440142 is 24104413003.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30031440149) 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, 699898 + ... + 741565.

It is an arithmetic number, because the mean of its divisors is an integer number (3074642712).

Almost surely, 2^30031440142 is an apocalyptic number.

30031440142 is a deficient number, since it is larger than the sum of its proper divisors (19162843250).

30031440142 is a wasteful number, since it uses less digits than its factorization.

30031440142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442423.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 30031440142 its reverse (24104413003), we get a palindrome (54135853145).

The spelling of 30031440142 in words is "thirty billion, thirty-one million, four hundred forty thousand, one hundred forty-two".