131133638 has 8 divisors (see below), whose sum is σ = 197126688. Its totient is φ = 65424744.

The previous prime is 131133599. The next prime is 131133647. The reversal of 131133638 is 836331131.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 131133638.

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, 69881 + ... + 71732.

It is an arithmetic number, because the mean of its divisors is an integer number (24640836).

Almost surely, 2^131133638 is an apocalyptic number.

131133638 is a deficient number, since it is larger than the sum of its proper divisors (65993050).

131133638 is a wasteful number, since it uses less digits than its factorization.

131133638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142078.

The product of its digits is 3888, while the sum is 29.

The square root of 131133638 is about 11451.3596572634. The cubic root of 131133638 is about 508.0479499864.

Adding to 131133638 its reverse (836331131), we get a palindrome (967464769).

The spelling of 131133638 in words is "one hundred thirty-one million, one hundred thirty-three thousand, six hundred thirty-eight".