2134556521 has 8 divisors (see below), whose sum is σ = 2155845384. Its totient is φ = 2113370880.

The previous prime is 2134556519. The next prime is 2134556531. The reversal of 2134556521 is 1256554312.

It can be written as a sum of positive squares in 4 ways, for example, as 1710649600 + 423906921 = 41360^2 + 20589^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2134556521 - 2¹ = 2134556519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2134556531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16095 + ... + 67291.

It is an arithmetic number, because the mean of its divisors is an integer number (269480673).

Almost surely, 2^2134556521 is an apocalyptic number.

It is an amenable number.

2134556521 is a deficient number, since it is larger than the sum of its proper divisors (21288863).

2134556521 is a wasteful number, since it uses less digits than its factorization.

2134556521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51611.

The product of its digits is 36000, while the sum is 34.

The square root of 2134556521 is about 46201.2610325736. The cubic root of 2134556521 is about 1287.5651688633.

The spelling of 2134556521 in words is "two billion, one hundred thirty-four million, five hundred fifty-six thousand, five hundred twenty-one".