137681551 has 8 divisors (see below), whose sum is σ = 161603360. Its totient is φ = 114823008.

The previous prime is 137681539. The next prime is 137681563. The reversal of 137681551 is 155186731.

137681551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (137681539) and next prime (137681563).

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 137681551 - 2⁹ = 137681039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137681551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137681051) 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, 265536 + ... + 266053.

It is an arithmetic number, because the mean of its divisors is an integer number (20200420).

Almost surely, 2^137681551 is an apocalyptic number.

137681551 is the 6775-th hex number.

137681551 is a deficient number, since it is larger than the sum of its proper divisors (23921809).

137681551 is an equidigital number, since it uses as much as digits as its factorization.

137681551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531633.

The product of its digits is 25200, while the sum is 37.

The square root of 137681551 is about 11733.7782065284. The cubic root of 137681551 is about 516.3671232597.

The spelling of 137681551 in words is "one hundred thirty-seven million, six hundred eighty-one thousand, five hundred fifty-one".