2156771034 has 48 divisors (see below), whose sum is σ = 5140010304. Its totient is φ = 653559720.

The previous prime is 2156771027. The next prime is 2156771039. The reversal of 2156771034 is 4301776512.

It is a happy number.

2156771034 is a `hidden beast` number, since 21 + 567 + 71 + 0 + 3 + 4 = 666.

It is a super-2 number, since 2×2156771034² = 9303322586202858312, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156771034.

It is not an unprimeable number, because it can be changed into a prime (2156771039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21054 + ... + 68969.

It is an arithmetic number, because the mean of its divisors is an integer number (107083548).

Almost surely, 2^2156771034 is an apocalyptic number.

2156771034 is an abundant number, since it is smaller than the sum of its proper divisors (2983239270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156771034 is a wasteful number, since it uses less digits than its factorization.

2156771034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90064 (or 90039 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 2156771034 is about 46441.0490191598. The cubic root of 2156771034 is about 1292.0163634916.

The spelling of 2156771034 in words is "two billion, one hundred fifty-six million, seven hundred seventy-one thousand, thirty-four".