42774631 has 4 divisors (see below), whose sum is σ = 43290072. Its totient is φ = 42259192.

The previous prime is 42774593. The next prime is 42774647. The reversal of 42774631 is 13647724.

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 42774631 - 2⁹ = 42774119 is a prime.

It is a super-2 number, since 2×42774631² = 3659338114372322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42774661) 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, 257596 + ... + 257761.

It is an arithmetic number, because the mean of its divisors is an integer number (10822518).

Almost surely, 2^42774631 is an apocalyptic number.

42774631 is a deficient number, since it is larger than the sum of its proper divisors (515441).

42774631 is an equidigital number, since it uses as much as digits as its factorization.

42774631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515440.

The product of its digits is 28224, while the sum is 34.

The square root of 42774631 is about 6540.2317237236. The cubic root of 42774631 is about 349.7266736810.

The spelling of 42774631 in words is "forty-two million, seven hundred seventy-four thousand, six hundred thirty-one".