242115555551 has 16 divisors (see below), whose sum is σ = 257894461440. Its totient is φ = 226508446080.

The previous prime is 242115555547. The next prime is 242115555571. The reversal of 242115555551 is 155555511242.

It is not a de Polignac number, because 242115555551 - 2² = 242115555547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242115555499 and 242115555508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242115555571) 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, 8161736 + ... + 8191346.

It is an arithmetic number, because the mean of its divisors is an integer number (16118403840).

Almost surely, 2^242115555551 is an apocalyptic number.

242115555551 is a deficient number, since it is larger than the sum of its proper divisors (15778905889).

242115555551 is a wasteful number, since it uses less digits than its factorization.

242115555551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32494.

The product of its digits is 250000, while the sum is 41.

The spelling of 242115555551 in words is "two hundred forty-two billion, one hundred fifteen million, five hundred fifty-five thousand, five hundred fifty-one".