131451437 has 4 divisors (see below), whose sum is σ = 141563100. Its totient is φ = 121339776.

The previous prime is 131451407. The next prime is 131451449. The reversal of 131451437 is 734154131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 734154131 = 109 ⋅6735359.

It can be written as a sum of positive squares in 2 ways, for example, as 5248681 + 126202756 = 2291^2 + 11234^2 .

It is a cyclic number.

It is not a de Polignac number, because 131451437 - 2¹⁶ = 131385901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131451407) 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, 5055812 + ... + 5055837.

It is an arithmetic number, because the mean of its divisors is an integer number (35390775).

Almost surely, 2^131451437 is an apocalyptic number.

It is an amenable number.

131451437 is a deficient number, since it is larger than the sum of its proper divisors (10111663).

131451437 is a wasteful number, since it uses less digits than its factorization.

131451437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111662.

The product of its digits is 5040, while the sum is 29.

The square root of 131451437 is about 11465.2272982266. The cubic root of 131451437 is about 508.4580326044.

The spelling of 131451437 in words is "one hundred thirty-one million, four hundred fifty-one thousand, four hundred thirty-seven".