30712081 has 8 divisors (see below), whose sum is σ = 32569344. Its totient is φ = 28860480.

The previous prime is 30712079. The next prime is 30712093. The reversal of 30712081 is 18021703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30712081 - 2¹ = 30712079 is a prime.

It is a super-2 number, since 2×30712081² = 1886463838701122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30712021) 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, 15936 + ... + 17758.

It is an arithmetic number, because the mean of its divisors is an integer number (4071168).

Almost surely, 2^30712081 is an apocalyptic number.

It is an amenable number.

30712081 is a deficient number, since it is larger than the sum of its proper divisors (1857263).

30712081 is a wasteful number, since it uses less digits than its factorization.

30712081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 30712081 is about 5541.8481574291. The cubic root of 30712081 is about 313.1624976641.

Adding to 30712081 its reverse (18021703), we get a palindrome (48733784).

The spelling of 30712081 in words is "thirty million, seven hundred twelve thousand, eighty-one".