4001431212 has 96 divisors (see below), whose sum is σ = 10684800000. Its totient is φ = 1294443072.

The previous prime is 4001431201. The next prime is 4001431229. The reversal of 4001431212 is 2121341004.

4001431212 is a `hidden beast` number, since 400 + 143 + 121 + 2 = 666.

It is a super-2 number, since 2×4001431212² = 32022903488735577888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 499414 + ... + 507362.

It is an arithmetic number, because the mean of its divisors is an integer number (111300000).

Almost surely, 2^4001431212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4001431212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5342400000).

4001431212 is an abundant number, since it is smaller than the sum of its proper divisors (6683368788).

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

4001431212 is a wasteful number, since it uses less digits than its factorization.

4001431212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8100 (or 8092 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 4001431212 is about 63256.8669157744. The cubic root of 4001431212 is about 1587.5903550118.

Adding to 4001431212 its reverse (2121341004), we get a palindrome (6122772216).

The spelling of 4001431212 in words is "four billion, one million, four hundred thirty-one thousand, two hundred twelve".