40642351 has 4 divisors (see below), whose sum is σ = 40655104. Its totient is φ = 40629600.

The previous prime is 40642339. The next prime is 40642363. The reversal of 40642351 is 15324604.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (40642339) and next prime (40642363).

It is a cyclic number.

It is not a de Polignac number, because 40642351 - 2⁵ = 40642319 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 (40642051) 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, 3031 + ... + 9511.

It is an arithmetic number, because the mean of its divisors is an integer number (10163776).

Almost surely, 2^40642351 is an apocalyptic number.

40642351 is a deficient number, since it is larger than the sum of its proper divisors (12753).

40642351 is an equidigital number, since it uses as much as digits as its factorization.

40642351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12752.

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

The square root of 40642351 is about 6375.1353711117. The cubic root of 40642351 is about 343.8161509716.

Adding to 40642351 its reverse (15324604), we get a palindrome (55966955).

The spelling of 40642351 in words is "forty million, six hundred forty-two thousand, three hundred fifty-one".