2128156051 has 4 divisors (see below), whose sum is σ = 2432178352. Its totient is φ = 1824133752.

The previous prime is 2128156049. The next prime is 2128156057. The reversal of 2128156051 is 1506518212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2128156051 - 2¹ = 2128156049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128156057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152011140 + ... + 152011153.

It is an arithmetic number, because the mean of its divisors is an integer number (608044588).

Almost surely, 2^2128156051 is an apocalyptic number.

2128156051 is a deficient number, since it is larger than the sum of its proper divisors (304022301).

2128156051 is an equidigital number, since it uses as much as digits as its factorization.

2128156051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304022300.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 2128156051 is about 46131.9417648986. The cubic root of 2128156051 is about 1286.2769585944.

The spelling of 2128156051 in words is "two billion, one hundred twenty-eight million, one hundred fifty-six thousand, fifty-one".