2151020438 has 32 divisors (see below), whose sum is σ = 4109875200. Its totient is φ = 821971584.

The previous prime is 2151020429. The next prime is 2151020483. The reversal of 2151020438 is 8340201512.

2151020438 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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233318 + ... + 242361.

It is an arithmetic number, because the mean of its divisors is an integer number (128433600).

Almost surely, 2^2151020438 is an apocalyptic number.

2151020438 is a deficient number, since it is larger than the sum of its proper divisors (1958854762).

2151020438 is a wasteful number, since it uses less digits than its factorization.

2151020438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475724.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2151020438 is about 46379.0948380841. The cubic root of 2151020438 is about 1290.8670408504.

The spelling of 2151020438 in words is "two billion, one hundred fifty-one million, twenty thousand, four hundred thirty-eight".