137147522 has 4 divisors (see below), whose sum is σ = 205721286. Its totient is φ = 68573760.

The previous prime is 137147513. The next prime is 137147531. The reversal of 137147522 is 225741731.

It is a Cunningham number, because it is equal to 11711²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225741731 = 71 ⋅3179461.

It is an interprime number because it is at equal distance from previous prime (137147513) and next prime (137147531).

It can be written as a sum of positive squares in only one way, i.e., 137147521 + 1 = 11711^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34286879 + ... + 34286882.

Almost surely, 2^137147522 is an apocalyptic number.

137147522 is a deficient number, since it is larger than the sum of its proper divisors (68573764).

137147522 is an equidigital number, since it uses as much as digits as its factorization.

137147522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68573763.

The product of its digits is 11760, while the sum is 32.

The square root of 137147522 is about 11711.0000426949. Note that the first 4 decimals coincide. The cubic root of 137147522 is about 515.6986427146.

The spelling of 137147522 in words is "one hundred thirty-seven million, one hundred forty-seven thousand, five hundred twenty-two".