40659551 has 2 divisors, whose sum is σ = 40659552. Its totient is φ = 40659550.

The previous prime is 40659539. The next prime is 40659557. The reversal of 40659551 is 15595604.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40659551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40659557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20329775 + 20329776.

It is an arithmetic number, because the mean of its divisors is an integer number (20329776).

Almost surely, 2^40659551 is an apocalyptic number.

40659551 is a deficient number, since it is larger than the sum of its proper divisors (1).

40659551 is an equidigital number, since it uses as much as digits as its factorization.

40659551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 40659551 is about 6376.4842193798. The cubic root of 40659551 is about 343.8646455725.

The spelling of 40659551 in words is "forty million, six hundred fifty-nine thousand, five hundred fifty-one".