2155021546 has 16 divisors (see below), whose sum is σ = 3252384000. Its totient is φ = 1070905968.

The previous prime is 2155021543. The next prime is 2155021559. The reversal of 2155021546 is 6451205512.

It is not an unprimeable number, because it can be changed into a prime (2155021543) 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, 436540 + ... + 441448.

It is an arithmetic number, because the mean of its divisors is an integer number (203274000).

Almost surely, 2^2155021546 is an apocalyptic number.

2155021546 is a deficient number, since it is larger than the sum of its proper divisors (1097362454).

2155021546 is a wasteful number, since it uses less digits than its factorization.

2155021546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 2155021546 is about 46422.2096199653. The cubic root of 2155021546 is about 1291.6669246719. Note that the first 3 decimals are identical.

The spelling of 2155021546 in words is "two billion, one hundred fifty-five million, twenty-one thousand, five hundred forty-six".