30713121 has 16 divisors (see below), whose sum is σ = 45713920. Its totient is φ = 20379600.

The previous prime is 30713107. The next prime is 30713131. The reversal of 30713121 is 12131703.

It is not a de Polignac number, because 30713121 - 2⁶ = 30713057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30713094 and 30713103.

It is not an unprimeable number, because it can be changed into a prime (30713131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3471 + ... + 8571.

It is an arithmetic number, because the mean of its divisors is an integer number (2857120).

Almost surely, 2^30713121 is an apocalyptic number.

It is an amenable number.

30713121 is a deficient number, since it is larger than the sum of its proper divisors (15000799).

30713121 is a wasteful number, since it uses less digits than its factorization.

30713121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5333 (or 5327 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 30713121 is about 5541.9419881482. The cubic root of 30713121 is about 313.1660324872.

Adding to 30713121 its reverse (12131703), we get a palindrome (42844824).

The spelling of 30713121 in words is "thirty million, seven hundred thirteen thousand, one hundred twenty-one".