42776231 has 2 divisors, whose sum is σ = 42776232. Its totient is φ = 42776230.

The previous prime is 42776221. The next prime is 42776257. The reversal of 42776231 is 13267724.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42776231 is a prime.

It is a super-2 number, since 2×42776231² = 3659611877130722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42776221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21388115 + 21388116.

It is an arithmetic number, because the mean of its divisors is an integer number (21388116).

Almost surely, 2^42776231 is an apocalyptic number.

42776231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42776231 is an equidigital number, since it uses as much as digits as its factorization.

42776231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 32.

The square root of 42776231 is about 6540.3540424047. The cubic root of 42776231 is about 349.7310341761.

The spelling of 42776231 in words is "forty-two million, seven hundred seventy-six thousand, two hundred thirty-one".