137540212 has 6 divisors (see below), whose sum is σ = 240695378. Its totient is φ = 68770104.

The previous prime is 137540209. The next prime is 137540231. The reversal of 137540212 is 212045731.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74718736 + 62821476 = 8644^2 + 7926^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17192523 + ... + 17192530.

Almost surely, 2^137540212 is an apocalyptic number.

It is an amenable number.

137540212 is a deficient number, since it is larger than the sum of its proper divisors (103155166).

137540212 is a wasteful number, since it uses less digits than its factorization.

137540212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34385057 (or 34385055 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 137540212 is about 11727.7539196557. The cubic root of 137540212 is about 516.1903680338.

Adding to 137540212 its reverse (212045731), we get a palindrome (349585943).

The spelling of 137540212 in words is "one hundred thirty-seven million, five hundred forty thousand, two hundred twelve".