242191637 has 16 divisors (see below), whose sum is σ = 251899200. Its totient is φ = 232742400.

The previous prime is 242191619. The next prime is 242191661. The reversal of 242191637 is 736191242.

It is a cyclic number.

It is not a de Polignac number, because 242191637 - 2²⁰ = 241143061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242191597 and 242191606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242191687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577814 + ... + 578232.

It is an arithmetic number, because the mean of its divisors is an integer number (15743700).

Almost surely, 2^242191637 is an apocalyptic number.

It is an amenable number.

242191637 is a deficient number, since it is larger than the sum of its proper divisors (9707563).

242191637 is a wasteful number, since it uses less digits than its factorization.

242191637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676.

The product of its digits is 18144, while the sum is 35.

The square root of 242191637 is about 15562.5074136529. The cubic root of 242191637 is about 623.3324182040.

The spelling of 242191637 in words is "two hundred forty-two million, one hundred ninety-one thousand, six hundred thirty-seven".