242002551 has 8 divisors (see below), whose sum is σ = 368765824. Its totient is φ = 138287160.

The previous prime is 242002549. The next prime is 242002567. The reversal of 242002551 is 155200242.

It is a happy number.

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

It is not a de Polignac number, because 242002551 - 2¹ = 242002549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 11523931 = 242002551 / (2 + 4 + 2 + 0 + 0 + 2 + 5 + 5 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242002511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5761945 + ... + 5761986.

It is an arithmetic number, because the mean of its divisors is an integer number (46095728).

Almost surely, 2^242002551 is an apocalyptic number.

242002551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

242002551 is a deficient number, since it is larger than the sum of its proper divisors (126763273).

242002551 is a wasteful number, since it uses less digits than its factorization.

242002551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11523941.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 242002551 is about 15556.4311781334. The cubic root of 242002551 is about 623.1701581008.

Adding to 242002551 its reverse (155200242), we get a palindrome (397202793).

The spelling of 242002551 in words is "two hundred forty-two million, two thousand, five hundred fifty-one".