131212534 has 8 divisors (see below), whose sum is σ = 198767808. Its totient is φ = 64956600.

The previous prime is 131212481. The next prime is 131212547. The reversal of 131212534 is 435212131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324582 + ... + 324985.

It is an arithmetic number, because the mean of its divisors is an integer number (24845976).

Almost surely, 2^131212534 is an apocalyptic number.

131212534 is a deficient number, since it is larger than the sum of its proper divisors (67555274).

131212534 is a wasteful number, since it uses less digits than its factorization.

131212534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649670.

The product of its digits is 720, while the sum is 22.

The square root of 131212534 is about 11454.8039703873. The cubic root of 131212534 is about 508.1498178615.

Adding to 131212534 its reverse (435212131), we get a palindrome (566424665).

The spelling of 131212534 in words is "one hundred thirty-one million, two hundred twelve thousand, five hundred thirty-four".