131214521 has 4 divisors (see below), whose sum is σ = 131252352. Its totient is φ = 131176692.

The previous prime is 131214509. The next prime is 131214533. The reversal of 131214521 is 125412131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125412131 = 13 ⋅9647087.

It is an interprime number because it is at equal distance from previous prime (131214509) and next prime (131214533).

It is a cyclic number.

It is not a de Polignac number, because 131214521 - 2²² = 127020217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131214493 and 131214502.

It is not an unprimeable number, because it can be changed into a prime (131214581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13121 + ... + 20846.

It is an arithmetic number, because the mean of its divisors is an integer number (32813088).

Almost surely, 2^131214521 is an apocalyptic number.

It is an amenable number.

131214521 is a deficient number, since it is larger than the sum of its proper divisors (37831).

131214521 is an equidigital number, since it uses as much as digits as its factorization.

131214521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37830.

The product of its digits is 240, while the sum is 20.

The square root of 131214521 is about 11454.8907022285. The cubic root of 131214521 is about 508.1523828822.

Adding to 131214521 its reverse (125412131), we get a palindrome (256626652).

The spelling of 131214521 in words is "one hundred thirty-one million, two hundred fourteen thousand, five hundred twenty-one".