40215151 has 4 divisors (see below), whose sum is σ = 40395712. Its totient is φ = 40034592.

The previous prime is 40215143. The next prime is 40215157. The reversal of 40215151 is 15151204.

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 40215151 - 2³ = 40215143 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 (40215157) 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, 89946 + ... + 90391.

It is an arithmetic number, because the mean of its divisors is an integer number (10098928).

Almost surely, 2^40215151 is an apocalyptic number.

40215151 is a deficient number, since it is larger than the sum of its proper divisors (180561).

40215151 is a wasteful number, since it uses less digits than its factorization.

40215151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180560.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 40215151 is about 6341.5416895263. The cubic root of 40215151 is about 342.6072649627.

Adding to 40215151 its reverse (15151204), we get a palindrome (55366355).

The spelling of 40215151 in words is "forty million, two hundred fifteen thousand, one hundred fifty-one".