40215463 has 4 divisors (see below), whose sum is σ = 41512768. Its totient is φ = 38918160.

The previous prime is 40215433. The next prime is 40215467. The reversal of 40215463 is 36451204.

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 40215463 - 2¹⁷ = 40084391 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 (40215467) 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, 648606 + ... + 648667.

It is an arithmetic number, because the mean of its divisors is an integer number (10378192).

Almost surely, 2^40215463 is an apocalyptic number.

40215463 is a deficient number, since it is larger than the sum of its proper divisors (1297305).

40215463 is a wasteful number, since it uses less digits than its factorization.

40215463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297304.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 40215463 is about 6341.5662891749. The cubic root of 40215463 is about 342.6081509736.

Adding to 40215463 its reverse (36451204), we get a palindrome (76666667).

It can be divided in two parts, 402 and 15463, that multiplied together give a palindrome (6216126).

The spelling of 40215463 in words is "forty million, two hundred fifteen thousand, four hundred sixty-three".