131020146 has 16 divisors (see below), whose sum is σ = 291156000. Its totient is φ = 43673364.

The previous prime is 131020117. The next prime is 131020151. The reversal of 131020146 is 641020131.

It is a happy number.

It is a super-2 number, since 2×131020146² = 34332557315722632, which contains 22 as substring.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213096 + ... + 1213203.

It is an arithmetic number, because the mean of its divisors is an integer number (18197250).

Almost surely, 2^131020146 is an apocalyptic number.

131020146 is an abundant number, since it is smaller than the sum of its proper divisors (160135854).

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

131020146 is a wasteful number, since it uses less digits than its factorization.

131020146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426310 (or 2426304 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 131020146 is about 11446.4031905223. The cubic root of 131020146 is about 507.9013412268.

Adding to 131020146 its reverse (641020131), we get a palindrome (772040277).

The spelling of 131020146 in words is "one hundred thirty-one million, twenty thousand, one hundred forty-six".