43522537 has 2 divisors, whose sum is σ = 43522538. Its totient is φ = 43522536.

The previous prime is 43522511. The next prime is 43522553. The reversal of 43522537 is 73522534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31764496 + 11758041 = 5636^2 + 3429^2 .

It is a cyclic number.

It is not a de Polignac number, because 43522537 - 2¹¹ = 43520489 is a prime.

It is a super-2 number, since 2×43522537² = 3788422453832738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43522499 and 43522508.

It is not a weakly prime, because it can be changed into another prime (43522637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21761268 + 21761269.

It is an arithmetic number, because the mean of its divisors is an integer number (21761269).

Almost surely, 2^43522537 is an apocalyptic number.

It is an amenable number.

43522537 is a deficient number, since it is larger than the sum of its proper divisors (1).

43522537 is an equidigital number, since it uses as much as digits as its factorization.

43522537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 31.

The square root of 43522537 is about 6597.1612834612. The cubic root of 43522537 is about 351.7532086624.

It can be divided in two parts, 4352 and 2537, that added together give a square (6889 = 83²).

The spelling of 43522537 in words is "forty-three million, five hundred twenty-two thousand, five hundred thirty-seven".