40152321 has 16 divisors (see below), whose sum is σ = 64893120. Its totient is φ = 24334560.

The previous prime is 40152293. The next prime is 40152337. The reversal of 40152321 is 12325104.

It is not a de Polignac number, because 40152321 - 2¹⁵ = 40119553 is a prime.

It is a super-2 number, since 2×40152321² = 3224417763374082, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40152294 and 40152303.

It is not an unprimeable number, because it can be changed into a prime (40152361) 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, 67300 + ... + 67893.

It is an arithmetic number, because the mean of its divisors is an integer number (4055820).

Almost surely, 2^40152321 is an apocalyptic number.

It is an amenable number.

40152321 is a deficient number, since it is larger than the sum of its proper divisors (24740799).

40152321 is a wasteful number, since it uses less digits than its factorization.

40152321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135213 (or 135207 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40152321 is about 6336.5859104095. The cubic root of 40152321 is about 342.4287482094.

Adding to 40152321 its reverse (12325104), we get a palindrome (52477425).

It can be divided in two parts, 4015 and 2321, that added together give a palindrome (6336).

The spelling of 40152321 in words is "forty million, one hundred fifty-two thousand, three hundred twenty-one".