30780131 has 4 divisors (see below), whose sum is σ = 31495992. Its totient is φ = 30064272.

The previous prime is 30780109. The next prime is 30780143. The reversal of 30780131 is 13108703.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30780131 - 2²² = 26585827 is a prime.

It is a super-2 number, since 2×30780131² = 1894832928754322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30780097 and 30780106.

It is not an unprimeable number, because it can be changed into a prime (30780151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357866 + ... + 357951.

It is an arithmetic number, because the mean of its divisors is an integer number (7873998).

Almost surely, 2^30780131 is an apocalyptic number.

30780131 is a deficient number, since it is larger than the sum of its proper divisors (715861).

30780131 is an equidigital number, since it uses as much as digits as its factorization.

30780131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715860.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 30780131 is about 5547.9844087741. The cubic root of 30780131 is about 313.3936226476.

Adding to 30780131 its reverse (13108703), we get a palindrome (43888834).

The spelling of 30780131 in words is "thirty million, seven hundred eighty thousand, one hundred thirty-one".