162131437 has 4 divisors (see below), whose sum is σ = 174603100. Its totient is φ = 149659776.

The previous prime is 162131381. The next prime is 162131443. The reversal of 162131437 is 734131261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 734131261 = 67 ⋅10957183.

It can be written as a sum of positive squares in 2 ways, for example, as 93141801 + 68989636 = 9651^2 + 8306^2 .

It is a cyclic number.

It is not a de Polignac number, because 162131437 - 2⁷ = 162131309 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 (162132437) 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, 6235812 + ... + 6235837.

It is an arithmetic number, because the mean of its divisors is an integer number (43650775).

Almost surely, 2^162131437 is an apocalyptic number.

It is an amenable number.

162131437 is a deficient number, since it is larger than the sum of its proper divisors (12471663).

162131437 is a wasteful number, since it uses less digits than its factorization.

162131437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12471662.

The product of its digits is 3024, while the sum is 28.

The square root of 162131437 is about 12733.0843474784. The cubic root of 162131437 is about 545.2835681681.

Adding to 162131437 its reverse (734131261), we get a palindrome (896262698).

The spelling of 162131437 in words is "one hundred sixty-two million, one hundred thirty-one thousand, four hundred thirty-seven".