31111230030 has 32 divisors (see below), whose sum is σ = 74888540064. Its totient is φ = 8271707136.

The previous prime is 31111230023. The next prime is 31111230047. The reversal of 31111230030 is 3003211113.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 31111229991 and 31111230009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1528527 + ... + 1548746.

It is an arithmetic number, because the mean of its divisors is an integer number (2340266877).

Almost surely, 2^31111230030 is an apocalyptic number.

31111230030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31111230030 is an abundant number, since it is smaller than the sum of its proper divisors (43777310034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31111230030 is a wasteful number, since it uses less digits than its factorization.

31111230030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077620.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31111230030 its reverse (3003211113), we get a palindrome (34114441143).

The spelling of 31111230030 in words is "thirty-one billion, one hundred eleven million, two hundred thirty thousand, thirty".