40521151 has 4 divisors (see below), whose sum is σ = 44204904. Its totient is φ = 36837400.

The previous prime is 40521133. The next prime is 40521157. The reversal of 40521151 is 15112504.

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 40521151 - 2⁵ = 40521119 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 (40521157) 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, 1841860 + ... + 1841881.

It is an arithmetic number, because the mean of its divisors is an integer number (11051226).

Almost surely, 2^40521151 is an apocalyptic number.

40521151 is a deficient number, since it is larger than the sum of its proper divisors (3683753).

40521151 is a wasteful number, since it uses less digits than its factorization.

40521151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683752.

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

The square root of 40521151 is about 6365.6225932740. The cubic root of 40521151 is about 343.4740447100.

Adding to 40521151 its reverse (15112504), we get a palindrome (55633655).

The spelling of 40521151 in words is "forty million, five hundred twenty-one thousand, one hundred fifty-one".