2156508733 has 2 divisors, whose sum is σ = 2156508734. Its totient is φ = 2156508732.

The previous prime is 2156508713. The next prime is 2156508743. The reversal of 2156508733 is 3378056512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1960452729 + 196056004 = 44277^2 + 14002^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156508733 - 2¹⁷ = 2156377661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156508713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078254366 + 1078254367.

It is an arithmetic number, because the mean of its divisors is an integer number (1078254367).

Almost surely, 2^2156508733 is an apocalyptic number.

It is an amenable number.

2156508733 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156508733 is an equidigital number, since it uses as much as digits as its factorization.

2156508733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 2156508733 is about 46438.2249122423. The cubic root of 2156508733 is about 1291.9639841216.

The spelling of 2156508733 in words is "two billion, one hundred fifty-six million, five hundred eight thousand, seven hundred thirty-three".