481521137 has 4 divisors (see below), whose sum is σ = 485782500. Its totient is φ = 477259776.

The previous prime is 481521127. The next prime is 481521151. The reversal of 481521137 is 731125184.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91221601 + 390299536 = 9551^2 + 19756^2 .

It is a cyclic number.

It is not a de Polignac number, because 481521137 - 2⁴ = 481521121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (481521127) 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, 2130512 + ... + 2130737.

It is an arithmetic number, because the mean of its divisors is an integer number (121445625).

Almost surely, 2^481521137 is an apocalyptic number.

It is an amenable number.

481521137 is a deficient number, since it is larger than the sum of its proper divisors (4261363).

481521137 is a wasteful number, since it uses less digits than its factorization.

481521137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261362.

The product of its digits is 6720, while the sum is 32.

The square root of 481521137 is about 21943.5898840641. The cubic root of 481521137 is about 783.7997463564.

It can be divided in two parts, 4815 and 21137, that added together give a palindrome (25952).

The spelling of 481521137 in words is "four hundred eighty-one million, five hundred twenty-one thousand, one hundred thirty-seven".