40743551 has 4 divisors (see below), whose sum is σ = 40781400. Its totient is φ = 40705704.

The previous prime is 40743533. The next prime is 40743553. The reversal of 40743551 is 15534704.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40743551 - 2⁶ = 40743487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40743553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17261 + ... + 19478.

It is an arithmetic number, because the mean of its divisors is an integer number (10195350).

Almost surely, 2^40743551 is an apocalyptic number.

40743551 is a deficient number, since it is larger than the sum of its proper divisors (37849).

40743551 is a wasteful number, since it uses less digits than its factorization.

40743551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37848.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 40743551 is about 6383.0675227511. The cubic root of 40743551 is about 344.1012833862.

The spelling of 40743551 in words is "forty million, seven hundred forty-three thousand, five hundred fifty-one".