42775251 has 24 divisors (see below), whose sum is σ = 60862464. Its totient is φ = 26717040.

The previous prime is 42775241. The next prime is 42775273. The reversal of 42775251 is 15257724.

42775251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42775251 - 2¹⁴ = 42758867 is a prime.

It is a super-2 number, since 2×42775251² = 3659444196226002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42775241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137386 + ... + 137696.

It is an arithmetic number, because the mean of its divisors is an integer number (2535936).

Almost surely, 2^42775251 is an apocalyptic number.

42775251 is a deficient number, since it is larger than the sum of its proper divisors (18087213).

42775251 is a wasteful number, since it uses less digits than its factorization.

42775251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 460 counting only the distinct ones).

The product of its digits is 19600, while the sum is 33.

The square root of 42775251 is about 6540.2791224840. The cubic root of 42775251 is about 349.7283633858.

The spelling of 42775251 in words is "forty-two million, seven hundred seventy-five thousand, two hundred fifty-one".