30801621 has 8 divisors (see below), whose sum is σ = 41321440. Its totient is φ = 20408112.

The previous prime is 30801613. The next prime is 30801643. The reversal of 30801621 is 12610803.

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

It is not a de Polignac number, because 30801621 - 2³ = 30801613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30801611) 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, 31006 + ... + 31983.

It is an arithmetic number, because the mean of its divisors is an integer number (5165180).

Almost surely, 2^30801621 is an apocalyptic number.

It is an amenable number.

30801621 is a deficient number, since it is larger than the sum of its proper divisors (10519819).

30801621 is a wasteful number, since it uses less digits than its factorization.

30801621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63155.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 30801621 is about 5549.9208102459. The cubic root of 30801621 is about 313.4665404896.

The spelling of 30801621 in words is "thirty million, eight hundred one thousand, six hundred twenty-one".