43761131 has 2 divisors, whose sum is σ = 43761132. Its totient is φ = 43761130.

The previous prime is 43761127. The next prime is 43761149. The reversal of 43761131 is 13116734.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43761131 - 2² = 43761127 is a prime.

It is a super-2 number, since 2×43761131² = 3830073172798322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43761131.

It is not a weakly prime, because it can be changed into another prime (43761191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21880565 + 21880566.

It is an arithmetic number, because the mean of its divisors is an integer number (21880566).

Almost surely, 2^43761131 is an apocalyptic number.

43761131 is a deficient number, since it is larger than the sum of its proper divisors (1).

43761131 is an equidigital number, since it uses as much as digits as its factorization.

43761131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 43761131 is about 6615.2196486587. The cubic root of 43761131 is about 352.3948173006.

Adding to 43761131 its reverse (13116734), we get a palindrome (56877865).

The spelling of 43761131 in words is "forty-three million, seven hundred sixty-one thousand, one hundred thirty-one".