2151535447 has 2 divisors, whose sum is σ = 2151535448. Its totient is φ = 2151535446.

The previous prime is 2151535411. The next prime is 2151535457. The reversal of 2151535447 is 7445351512.

2151535447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2151535447 - 2¹¹ = 2151533399 is a prime.

It is a super-4 number, since 4×2151535447⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151535457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075767723 + 1075767724.

It is an arithmetic number, because the mean of its divisors is an integer number (1075767724).

Almost surely, 2^2151535447 is an apocalyptic number.

2151535447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151535447 is an equidigital number, since it uses as much as digits as its factorization.

2151535447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 37.

The square root of 2151535447 is about 46384.6466732258. The cubic root of 2151535447 is about 1290.9700547629.

Adding to 2151535447 its reverse (7445351512), we get a palindrome (9596886959).

The spelling of 2151535447 in words is "two billion, one hundred fifty-one million, five hundred thirty-five thousand, four hundred forty-seven".