131213755 has 8 divisors (see below), whose sum is σ = 157586400. Its totient is φ = 104884416.

The previous prime is 131213749. The next prime is 131213767. The reversal of 131213755 is 557312131.

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

It is a cyclic number.

It is not a de Polignac number, because 131213755 - 2⁵ = 131213723 is a prime.

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, 3735 + ... + 16624.

It is an arithmetic number, because the mean of its divisors is an integer number (19698300).

Almost surely, 2^131213755 is an apocalyptic number.

131213755 is a deficient number, since it is larger than the sum of its proper divisors (26372645).

131213755 is a wasteful number, since it uses less digits than its factorization.

131213755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21653.

The product of its digits is 3150, while the sum is 28.

The square root of 131213755 is about 11454.8572666795. The cubic root of 131213755 is about 508.1513940550.

Adding to 131213755 its reverse (557312131), we get a palindrome (688525886).

The spelling of 131213755 in words is "one hundred thirty-one million, two hundred thirteen thousand, seven hundred fifty-five".