131051421 has 12 divisors (see below), whose sum is σ = 190344700. Its totient is φ = 86883840.

The previous prime is 131051387. The next prime is 131051423. The reversal of 131051421 is 124150131.

131051421 is a `hidden beast` number, since 131 + 0 + 514 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19980900 + 111070521 = 4470^2 + 10539^2 .

It is not a de Polignac number, because 131051421 - 2¹³ = 131043229 is a prime.

It is a super-2 number, since 2×131051421² = 34348949892238482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131051394 and 131051403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131051423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38596 + ... + 41853.

Almost surely, 2^131051421 is an apocalyptic number.

It is an amenable number.

131051421 is a deficient number, since it is larger than the sum of its proper divisors (59293279).

131051421 is a wasteful number, since it uses less digits than its factorization.

131051421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80636 (or 80633 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 131051421 is about 11447.7692586809. The cubic root of 131051421 is about 507.9417506630.

The spelling of 131051421 in words is "one hundred thirty-one million, fifty-one thousand, four hundred twenty-one".