137625551 has 4 divisors (see below), whose sum is σ = 157286352. Its totient is φ = 117964752.

The previous prime is 137625487. The next prime is 137625599. The reversal of 137625551 is 155526731.

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 137625551 - 2⁶ = 137625487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137625451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9830390 + ... + 9830403.

It is an arithmetic number, because the mean of its divisors is an integer number (39321588).

Almost surely, 2^137625551 is an apocalyptic number.

137625551 is a deficient number, since it is larger than the sum of its proper divisors (19660801).

137625551 is an equidigital number, since it uses as much as digits as its factorization.

137625551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19660800.

The product of its digits is 31500, while the sum is 35.

The square root of 137625551 is about 11731.3916906734. The cubic root of 137625551 is about 516.2971054540.

The spelling of 137625551 in words is "one hundred thirty-seven million, six hundred twenty-five thousand, five hundred fifty-one".