30312021231 has 16 divisors (see below), whose sum is σ = 46001985120. Its totient is φ = 19715135040.

The previous prime is 30312021197. The next prime is 30312021263. The reversal of 30312021231 is 13212021303.

30312021231 is a `hidden beast` number, since 303 + 120 + 212 + 31 = 666.

It is not a de Polignac number, because 30312021231 - 2²¹ = 30309924079 is a prime.

It is a super-2 number, since 2×30312021231² (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 (30312021031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13689960 + ... + 13692173.

It is an arithmetic number, because the mean of its divisors is an integer number (2875124070).

Almost surely, 2^30312021231 is an apocalyptic number.

30312021231 is a deficient number, since it is larger than the sum of its proper divisors (15689963889).

30312021231 is a wasteful number, since it uses less digits than its factorization.

30312021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27382183 (or 27382177 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30312021231 its reverse (13212021303), we get a palindrome (43524042534).

The spelling of 30312021231 in words is "thirty billion, three hundred twelve million, twenty-one thousand, two hundred thirty-one".