240001551 has 12 divisors (see below), whose sum is σ = 347136712. Its totient is φ = 159785136.

The previous prime is 240001519. The next prime is 240001603. The reversal of 240001551 is 155100042.

It is not a de Polignac number, because 240001551 - 2⁵ = 240001519 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 (240001501) 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 11 ways as a sum of consecutive naturals, for example, 10801 + ... + 24426.

Almost surely, 2^240001551 is an apocalyptic number.

240001551 is a deficient number, since it is larger than the sum of its proper divisors (107135161).

240001551 is a wasteful number, since it uses less digits than its factorization.

240001551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35990 (or 35987 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 240001551 is about 15491.9834430585. The cubic root of 240001551 is about 621.4478398872.

Adding to 240001551 its reverse (155100042), we get a palindrome (395101593).

The spelling of 240001551 in words is "two hundred forty million, one thousand, five hundred fifty-one".