67242551 has 4 divisors (see below), whose sum is σ = 67591152. Its totient is φ = 66893952.

The previous prime is 67242493. The next prime is 67242569. The reversal of 67242551 is 15524276.

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 67242551 - 2¹⁰ = 67241527 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 (67242451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174011 + ... + 174396.

It is an arithmetic number, because the mean of its divisors is an integer number (16897788).

Almost surely, 2^67242551 is an apocalyptic number.

67242551 is a deficient number, since it is larger than the sum of its proper divisors (348601).

67242551 is a wasteful number, since it uses less digits than its factorization.

67242551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348600.

The product of its digits is 16800, while the sum is 32.

The square root of 67242551 is about 8200.1555473052. The cubic root of 67242551 is about 406.6443354963.

The spelling of 67242551 in words is "sixty-seven million, two hundred forty-two thousand, five hundred fifty-one".