40413551 has 4 divisors (see below), whose sum is σ = 42540600. Its totient is φ = 38286504.

The previous prime is 40413547. The next prime is 40413557. The reversal of 40413551 is 15531404.

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 40413551 - 2² = 40413547 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 (40413557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063496 + ... + 1063533.

It is an arithmetic number, because the mean of its divisors is an integer number (10635150).

Almost surely, 2^40413551 is an apocalyptic number.

40413551 is a deficient number, since it is larger than the sum of its proper divisors (2127049).

40413551 is a wasteful number, since it uses less digits than its factorization.

40413551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127048.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 40413551 is about 6357.1653274081. The cubic root of 40413551 is about 343.1697545038.

Adding to 40413551 its reverse (15531404), we get a palindrome (55944955).

The spelling of 40413551 in words is "forty million, four hundred thirteen thousand, five hundred fifty-one".