2155225288861 has 8 divisors (see below), whose sum is σ = 2229571032480. Its totient is φ = 2080881387312.

The previous prime is 2155225288807. The next prime is 2155225288897. The reversal of 2155225288861 is 1688825225512.

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 2155225288861 - 2³¹ = 2153077805213 is a prime.

It is a super-3 number, since 3×2155225288861³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155225288361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2175706 + ... + 3007348.

It is an arithmetic number, because the mean of its divisors is an integer number (278696379060).

Almost surely, 2^{2155225288861} is an apocalyptic number.

It is an amenable number.

2155225288861 is a deficient number, since it is larger than the sum of its proper divisors (74345743619).

2155225288861 is an equidigital number, since it uses as much as digits as its factorization.

2155225288861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921035.

The product of its digits is 6144000, while the sum is 55.

The spelling of 2155225288861 in words is "two trillion, one hundred fifty-five billion, two hundred twenty-five million, two hundred eighty-eight thousand, eight hundred sixty-one".