137230221 has 8 divisors (see below), whose sum is σ = 183060864. Its totient is φ = 91443200.

The previous prime is 137230199. The next prime is 137230241. The reversal of 137230221 is 122032731.

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

It is a cyclic number.

It is not a de Polignac number, because 137230221 - 2⁹ = 137229709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137230241) 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, 2676 + ... + 16781.

It is an arithmetic number, because the mean of its divisors is an integer number (22882608).

Almost surely, 2^137230221 is an apocalyptic number.

It is an amenable number.

137230221 is a deficient number, since it is larger than the sum of its proper divisors (45830643).

137230221 is a wasteful number, since it uses less digits than its factorization.

137230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21811.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 137230221 is about 11714.5303362960. The cubic root of 137230221 is about 515.8022761166.

Adding to 137230221 its reverse (122032731), we get a palindrome (259262952).

The spelling of 137230221 in words is "one hundred thirty-seven million, two hundred thirty thousand, two hundred twenty-one".