40445551 has 16 divisors (see below), whose sum is σ = 42791040. Its totient is φ = 38188800.

The previous prime is 40445549. The next prime is 40445579. The reversal of 40445551 is 15554404.

It is a cyclic number.

It is not a de Polignac number, because 40445551 - 2¹ = 40445549 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 (40445591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295155 + ... + 295291.

It is an arithmetic number, because the mean of its divisors is an integer number (2674440).

Almost surely, 2^40445551 is an apocalyptic number.

40445551 is a deficient number, since it is larger than the sum of its proper divisors (2345489).

40445551 is a wasteful number, since it uses less digits than its factorization.

40445551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 40445551 is about 6359.6816744236. The cubic root of 40445551 is about 343.2603061028.

Adding to 40445551 its reverse (15554404), we get a palindrome (55999955).

The spelling of 40445551 in words is "forty million, four hundred forty-five thousand, five hundred fifty-one".