240402551 has 8 divisors (see below), whose sum is σ = 253929984. Its totient is φ = 227235960.

The previous prime is 240402527. The next prime is 240402577. The reversal of 240402551 is 155204042.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240402551 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 (240402511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88841 + ... + 91506.

It is an arithmetic number, because the mean of its divisors is an integer number (31741248).

Almost surely, 2^240402551 is an apocalyptic number.

240402551 is a deficient number, since it is larger than the sum of its proper divisors (13527433).

240402551 is a wasteful number, since it uses less digits than its factorization.

240402551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180421.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 240402551 is about 15504.9202190788. The cubic root of 240402551 is about 621.7937569885.

Adding to 240402551 its reverse (155204042), we get a palindrome (395606593).

The spelling of 240402551 in words is "two hundred forty million, four hundred two thousand, five hundred fifty-one".