137888231 has 4 divisors (see below), whose sum is σ = 148495032. Its totient is φ = 127281432.

The previous prime is 137888227. The next prime is 137888249. The reversal of 137888231 is 132888731.

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

It is a cyclic number.

It is not a de Polignac number, because 137888231 - 2² = 137888227 is a prime.

It is a super-2 number, since 2×137888231² = 38026328496618722, 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 (137888221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5303381 + ... + 5303406.

It is an arithmetic number, because the mean of its divisors is an integer number (37123758).

Almost surely, 2^137888231 is an apocalyptic number.

137888231 is a deficient number, since it is larger than the sum of its proper divisors (10606801).

137888231 is a wasteful number, since it uses less digits than its factorization.

137888231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10606800.

The product of its digits is 64512, while the sum is 41.

The square root of 137888231 is about 11742.5819562820. The cubic root of 137888231 is about 516.6253747553.

The spelling of 137888231 in words is "one hundred thirty-seven million, eight hundred eighty-eight thousand, two hundred thirty-one".