2131006406 has 32 divisors (see below), whose sum is σ = 3494679552. Its totient is φ = 970583040.

The previous prime is 2131006403. The next prime is 2131006421. The reversal of 2131006406 is 6046001312.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131006403) 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, 171020 + ... + 183056.

It is an arithmetic number, because the mean of its divisors is an integer number (109208736).

Almost surely, 2^2131006406 is an apocalyptic number.

2131006406 is a deficient number, since it is larger than the sum of its proper divisors (1363673146).

2131006406 is a wasteful number, since it uses less digits than its factorization.

2131006406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2131006406 is about 46162.8249352225. The cubic root of 2131006406 is about 1286.8509626060.

Adding to 2131006406 its reverse (6046001312), we get a palindrome (8177007718).

The spelling of 2131006406 in words is "two billion, one hundred thirty-one million, six thousand, four hundred six".