137748231 has 18 divisors (see below), whose sum is σ = 206078600. Its totient is φ = 88660656.

The previous prime is 137748223. The next prime is 137748251. The reversal of 137748231 is 132847731.

It is not a de Polignac number, because 137748231 - 2³ = 137748223 is a prime.

It is a super-2 number, since 2×137748231² = 37949150287258722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137748251) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1531 + ... + 16668.

Almost surely, 2^137748231 is an apocalyptic number.

137748231 is a deficient number, since it is larger than the sum of its proper divisors (68330369).

137748231 is a wasteful number, since it uses less digits than its factorization.

137748231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18263 (or 18231 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 137748231 is about 11736.6192321298. The cubic root of 137748231 is about 516.4504697032.

The spelling of 137748231 in words is "one hundred thirty-seven million, seven hundred forty-eight thousand, two hundred thirty-one".