131213555 has 8 divisors (see below), whose sum is σ = 171770544. Its totient is φ = 95428000.

The previous prime is 131213477. The next prime is 131213561. The reversal of 131213555 is 555312131.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-131213555 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, 1192796 + ... + 1192905.

It is an arithmetic number, because the mean of its divisors is an integer number (21471318).

Almost surely, 2^131213555 is an apocalyptic number.

131213555 is a deficient number, since it is larger than the sum of its proper divisors (40556989).

131213555 is a wasteful number, since it uses less digits than its factorization.

131213555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385717.

The product of its digits is 2250, while the sum is 26.

The square root of 131213555 is about 11454.8485367551. The cubic root of 131213555 is about 508.1511358749.

Adding to 131213555 its reverse (555312131), we get a palindrome (686525686).

The spelling of 131213555 in words is "one hundred thirty-one million, two hundred thirteen thousand, five hundred fifty-five".