30881223 has 8 divisors (see below), whose sum is σ = 45750000. Its totient is φ = 20587464.

The previous prime is 30881173. The next prime is 30881261. The reversal of 30881223 is 32218803.

It is not a de Polignac number, because 30881223 - 2¹⁴ = 30864839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1143749 = 30881223 / (3 + 0 + 8 + 8 + 1 + 2 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30881423) 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, 571848 + ... + 571901.

It is an arithmetic number, because the mean of its divisors is an integer number (5718750).

Almost surely, 2^30881223 is an apocalyptic number.

30881223 is a deficient number, since it is larger than the sum of its proper divisors (14868777).

30881223 is a wasteful number, since it uses less digits than its factorization.

30881223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143758 (or 1143752 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 30881223 is about 5557.0876365233. The cubic root of 30881223 is about 313.7363433790.

The spelling of 30881223 in words is "thirty million, eight hundred eighty-one thousand, two hundred twenty-three".