30142531 has 16 divisors (see below), whose sum is σ = 33242400. Its totient is φ = 27226368.

The previous prime is 30142507. The next prime is 30142543. The reversal of 30142531 is 13524103.

It is a cyclic number.

It is not a de Polignac number, because 30142531 - 2⁷ = 30142403 is a prime.

It is a super-2 number, since 2×30142531² = 1817144350171922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 30142499 and 30142508.

It is not an unprimeable number, because it can be changed into a prime (30142501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36855 + ... + 37663.

It is an arithmetic number, because the mean of its divisors is an integer number (2077650).

Almost surely, 2^30142531 is an apocalyptic number.

30142531 is a deficient number, since it is larger than the sum of its proper divisors (3099869).

30142531 is a wasteful number, since it uses less digits than its factorization.

30142531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 30142531 is about 5490.2213980859. The cubic root of 30142531 is about 311.2145588480.

Adding to 30142531 its reverse (13524103), we get a palindrome (43666634).

The spelling of 30142531 in words is "thirty million, one hundred forty-two thousand, five hundred thirty-one".