2155542045 has 8 divisors (see below), whose sum is σ = 3448867296. Its totient is φ = 1149622416.

The previous prime is 2155542043. The next prime is 2155542061. The reversal of 2155542045 is 5402455512.

2155542045 is digitally balanced in base 2 and base 4, because in such bases 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 not a de Polignac number, because 2155542045 - 2¹ = 2155542043 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2155541997 and 2155542015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155542043) 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, 71851387 + ... + 71851416.

It is an arithmetic number, because the mean of its divisors is an integer number (431108412).

Almost surely, 2^2155542045 is an apocalyptic number.

It is an amenable number.

2155542045 is a deficient number, since it is larger than the sum of its proper divisors (1293325251).

2155542045 is a wasteful number, since it uses less digits than its factorization.

2155542045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143702811.

The product of its (nonzero) digits is 40000, while the sum is 33.

The square root of 2155542045 is about 46427.8154235152. The cubic root of 2155542045 is about 1291.7709077348.

Adding to 2155542045 its reverse (5402455512), we get a palindrome (7557997557).

The spelling of 2155542045 in words is "two billion, one hundred fifty-five million, five hundred forty-two thousand, forty-five".