231211104 has 96 divisors (see below), whose sum is σ = 623750400. Its totient is φ = 74967552.

The previous prime is 231211103. The next prime is 231211109. The reversal of 231211104 is 401112132.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×231211104² = 106917149225797632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231211103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662322 + ... + 662670.

It is an arithmetic number, because the mean of its divisors is an integer number (6497400).

Almost surely, 2^231211104 is an apocalyptic number.

231211104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231211104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311875200).

231211104 is an abundant number, since it is smaller than the sum of its proper divisors (392539296).

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

231211104 is a wasteful number, since it uses less digits than its factorization.

231211104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 231211104 is about 15205.6273793619. The cubic root of 231211104 is about 613.7660976389.

Adding to 231211104 its reverse (401112132), we get a palindrome (632323236).

The spelling of 231211104 in words is "two hundred thirty-one million, two hundred eleven thousand, one hundred four".