40371551 has 16 divisors (see below), whose sum is σ = 45521568. Its totient is φ = 35481600.

The previous prime is 40371503. The next prime is 40371559. The reversal of 40371551 is 15517304.

It is not a de Polignac number, because 40371551 - 2²² = 36177247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40371551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40371559) 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, 114191 + ... + 114543.

It is an arithmetic number, because the mean of its divisors is an integer number (2845098).

Almost surely, 2^40371551 is an apocalyptic number.

40371551 is a deficient number, since it is larger than the sum of its proper divisors (5150017).

40371551 is a wasteful number, since it uses less digits than its factorization.

40371551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 40371551 is about 6353.8611095931. The cubic root of 40371551 is about 343.0508329606.

Adding to 40371551 its reverse (15517304), we get a palindrome (55888855).

The spelling of 40371551 in words is "forty million, three hundred seventy-one thousand, five hundred fifty-one".