30251142 has 24 divisors (see below), whose sum is σ = 65751816. Its totient is φ = 10051776.

The previous prime is 30251131. The next prime is 30251159. The reversal of 30251142 is 24115203.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3573 + ... + 8559.

It is an arithmetic number, because the mean of its divisors is an integer number (2739659).

Almost surely, 2^30251142 is an apocalyptic number.

30251142 is an abundant number, since it is smaller than the sum of its proper divisors (35500674).

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

30251142 is a wasteful number, since it uses less digits than its factorization.

30251142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332 (or 5329 counting only the distinct ones).

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

The square root of 30251142 is about 5500.1038172020. The cubic root of 30251142 is about 311.5879051489.

Adding to 30251142 its reverse (24115203), we get a palindrome (54366345).

The spelling of 30251142 in words is "thirty million, two hundred fifty-one thousand, one hundred forty-two".