131020646 has 16 divisors (see below), whose sum is σ = 199508400. Its totient is φ = 64522848.

The previous prime is 131020633. The next prime is 131020691. The reversal of 131020646 is 646020131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63560 + ... + 65588.

It is an arithmetic number, because the mean of its divisors is an integer number (12469275).

Almost surely, 2^131020646 is an apocalyptic number.

131020646 is a deficient number, since it is larger than the sum of its proper divisors (68487754).

131020646 is a wasteful number, since it uses less digits than its factorization.

131020646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503.

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

The square root of 131020646 is about 11446.4250314236. The cubic root of 131020646 is about 507.9019873115.

Adding to 131020646 its reverse (646020131), we get a palindrome (777040777).

The spelling of 131020646 in words is "one hundred thirty-one million, twenty thousand, six hundred forty-six".