2151550 has 24 divisors (see below), whose sum is σ = 4113576. Its totient is φ = 836640.

The previous prime is 2151533. The next prime is 2151563. The reversal of 2151550 is 551512.

2151550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1269 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (171399).

2^2151550 is an apocalyptic number.

2151550 is a deficient number, since it is larger than the sum of its proper divisors (1962026).

2151550 is a wasteful number, since it uses less digits than its factorization.

2151550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 2151550 is about 1466.8162802478. The cubic root of 2151550 is about 129.0972965466.

It can be divided in two parts, 2151 and 550, that added together give a triangular number (2701 = T₇₃).

The spelling of 2151550 in words is "two million, one hundred fifty-one thousand, five hundred fifty".