131022146 has 4 divisors (see below), whose sum is σ = 196533222. Its totient is φ = 65511072.

The previous prime is 131022137. The next prime is 131022163. The reversal of 131022146 is 641220131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641220131 = 29 ⋅22111039.

It can be written as a sum of positive squares in only one way, i.e., 128572921 + 2449225 = 11339^2 + 1565^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32755535 + ... + 32755538.

Almost surely, 2^131022146 is an apocalyptic number.

131022146 is a deficient number, since it is larger than the sum of its proper divisors (65511076).

131022146 is an equidigital number, since it uses as much as digits as its factorization.

131022146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65511075.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 131022146 is about 11446.4905538772. The cubic root of 131022146 is about 507.9039255558.

Adding to 131022146 its reverse (641220131), we get a palindrome (772242277).

The spelling of 131022146 in words is "one hundred thirty-one million, twenty-two thousand, one hundred forty-six".