2155035421 has 16 divisors (see below), whose sum is σ = 2687827968. Its totient is φ = 1678604400.

The previous prime is 2155035397. The next prime is 2155035451. The reversal of 2155035421 is 1245305512.

It is not a de Polignac number, because 2155035421 - 2⁷ = 2155035293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2155035421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155035451) 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, 340516 + ... + 346786.

It is an arithmetic number, because the mean of its divisors is an integer number (167989248).

Almost surely, 2^2155035421 is an apocalyptic number.

It is an amenable number.

2155035421 is a deficient number, since it is larger than the sum of its proper divisors (532792547).

2155035421 is a wasteful number, since it uses less digits than its factorization.

2155035421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10752.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2155035421 is about 46422.3590632790. The cubic root of 2155035421 is about 1291.6696967773.

The spelling of 2155035421 in words is "two billion, one hundred fifty-five million, thirty-five thousand, four hundred twenty-one".