42278351 has 4 divisors (see below), whose sum is σ = 42813600. Its totient is φ = 41743104.

The previous prime is 42278329. The next prime is 42278359. The reversal of 42278351 is 15387224.

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 42278351 - 2¹⁰ = 42277327 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 (42278359) 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, 267506 + ... + 267663.

It is an arithmetic number, because the mean of its divisors is an integer number (10703400).

Almost surely, 2^42278351 is an apocalyptic number.

42278351 is a deficient number, since it is larger than the sum of its proper divisors (535249).

42278351 is an equidigital number, since it uses as much as digits as its factorization.

42278351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535248.

The product of its digits is 13440, while the sum is 32.

The square root of 42278351 is about 6502.1804804235. The cubic root of 42278351 is about 348.3688754944.

The spelling of 42278351 in words is "forty-two million, two hundred seventy-eight thousand, three hundred fifty-one".