7242155881 has 8 divisors (see below), whose sum is σ = 7785521280. Its totient is φ = 6715010448.

The previous prime is 7242155863. The next prime is 7242155917. The reversal of 7242155881 is 1885512427.

7242155881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 7242155881 - 2¹⁵ = 7242123113 is a prime.

It is a super-2 number, since 2×7242155881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7242155821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4054066 + ... + 4055851.

It is an arithmetic number, because the mean of its divisors is an integer number (973190160).

Almost surely, 2^7242155881 is an apocalyptic number.

It is an amenable number.

7242155881 is a deficient number, since it is larger than the sum of its proper divisors (543365399).

7242155881 is a wasteful number, since it uses less digits than its factorization.

7242155881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109983.

The product of its digits is 179200, while the sum is 43.

The square root of 7242155881 is about 85100.8571108423. The cubic root of 7242155881 is about 1934.7400542403.

The spelling of 7242155881 in words is "seven billion, two hundred forty-two million, one hundred fifty-five thousand, eight hundred eighty-one".