30551142 has 16 divisors (see below), whose sum is σ = 64696752. Its totient is φ = 9584640.

The previous prime is 30551141. The next prime is 30551149. The reversal of 30551142 is 24115503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30551141) 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, 149659 + ... + 149862.

It is an arithmetic number, because the mean of its divisors is an integer number (4043547).

Almost surely, 2^30551142 is an apocalyptic number.

30551142 is an abundant number, since it is smaller than the sum of its proper divisors (34145610).

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

30551142 is a wasteful number, since it uses less digits than its factorization.

30551142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299543.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 30551142 is about 5527.3087483874. The cubic root of 30551142 is about 312.6145227188.

Adding to 30551142 its reverse (24115503), we get a palindrome (54666645).

The spelling of 30551142 in words is "thirty million, five hundred fifty-one thousand, one hundred forty-two".