137312481 has 4 divisors (see below), whose sum is σ = 183083312. Its totient is φ = 91541652.

The previous prime is 137312479. The next prime is 137312491. The reversal of 137312481 is 184213731.

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.

It is not a de Polignac number, because 137312481 - 2¹ = 137312479 is a prime.

It is a super-2 number, since 2×137312481² = 37709434876750722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137312471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22885411 + ... + 22885416.

It is an arithmetic number, because the mean of its divisors is an integer number (45770828).

Almost surely, 2^137312481 is an apocalyptic number.

It is an amenable number.

137312481 is a deficient number, since it is larger than the sum of its proper divisors (45770831).

137312481 is an equidigital number, since it uses as much as digits as its factorization.

137312481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45770830.

The product of its digits is 4032, while the sum is 30.

The square root of 137312481 is about 11718.0408345423. The cubic root of 137312481 is about 515.9053180943.

The spelling of 137312481 in words is "one hundred thirty-seven million, three hundred twelve thousand, four hundred eighty-one".