43461631 has 2 divisors, whose sum is σ = 43461632. Its totient is φ = 43461630.

The previous prime is 43461629. The next prime is 43461653. The reversal of 43461631 is 13616434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43461631 - 2¹ = 43461629 is a prime.

It is a super-2 number, since 2×43461631² = 3777826738360322, which contains 22 as substring.

Together with 43461629, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 43461631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43461601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21730815 + 21730816.

It is an arithmetic number, because the mean of its divisors is an integer number (21730816).

Almost surely, 2^43461631 is an apocalyptic number.

43461631 is a deficient number, since it is larger than the sum of its proper divisors (1).

43461631 is an equidigital number, since it uses as much as digits as its factorization.

43461631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 43461631 is about 6592.5435910580. The cubic root of 43461631 is about 351.5890494030.

The spelling of 43461631 in words is "forty-three million, four hundred sixty-one thousand, six hundred thirty-one".