30228161781 has 8 divisors (see below), whose sum is σ = 40574714400. Its totient is φ = 20016858512.

The previous prime is 30228161773. The next prime is 30228161791. The reversal of 30228161781 is 18716182203.

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 30228161781 - 2³ = 30228161773 is a prime.

It is a super-2 number, since 2×30228161781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30228161741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33811815 + ... + 33812708.

It is an arithmetic number, because the mean of its divisors is an integer number (5071839300).

Almost surely, 2^30228161781 is an apocalyptic number.

It is an amenable number.

30228161781 is a deficient number, since it is larger than the sum of its proper divisors (10346552619).

30228161781 is a wasteful number, since it uses less digits than its factorization.

30228161781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67624675.

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 30228161781 in words is "thirty billion, two hundred twenty-eight million, one hundred sixty-one thousand, seven hundred eighty-one".