137566481 has 8 divisors (see below), whose sum is σ = 152153064. Its totient is φ = 123552000.

The previous prime is 137566469. The next prime is 137566487. The reversal of 137566481 is 184665731.

It can be written as a sum of positive squares in 4 ways, for example, as 29593600 + 107972881 = 5440^2 + 10391^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137566481 - 2¹⁰ = 137565457 is a prime.

It is a super-2 number, since 2×137566481² = 37849073389446722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137566487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142520 + ... + 143481.

It is an arithmetic number, because the mean of its divisors is an integer number (19019133).

Almost surely, 2^137566481 is an apocalyptic number.

It is an amenable number.

137566481 is a deficient number, since it is larger than the sum of its proper divisors (14586583).

137566481 is a wasteful number, since it uses less digits than its factorization.

137566481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286051.

The product of its digits is 120960, while the sum is 41.

The square root of 137566481 is about 11728.8738163559. The cubic root of 137566481 is about 516.2232285851.

The spelling of 137566481 in words is "one hundred thirty-seven million, five hundred sixty-six thousand, four hundred eighty-one".