131213251 has 8 divisors (see below), whose sum is σ = 141916320. Its totient is φ = 120597312.

The previous prime is 131213249. The next prime is 131213261. The reversal of 131213251 is 152312131.

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 131213251 - 2¹ = 131213249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131213261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18631 + ... + 24688.

It is an arithmetic number, because the mean of its divisors is an integer number (17739540).

Almost surely, 2^131213251 is an apocalyptic number.

131213251 is a deficient number, since it is larger than the sum of its proper divisors (10703069).

131213251 is a wasteful number, since it uses less digits than its factorization.

131213251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43565.

The product of its digits is 180, while the sum is 19.

The square root of 131213251 is about 11454.8352672572. The cubic root of 131213251 is about 508.1507434407.

Adding to 131213251 its reverse (152312131), we get a palindrome (283525382).

The spelling of 131213251 in words is "one hundred thirty-one million, two hundred thirteen thousand, two hundred fifty-one".