2151532225649 has 2 divisors, whose sum is σ = 2151532225650. Its totient is φ = 2151532225648.

The previous prime is 2151532225639. The next prime is 2151532225697. The reversal of 2151532225649 is 9465222351512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2138262798400 + 13269427249 = 1462280^2 + 115193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151532225649 is a prime.

It is a super-2 number, since 2×2151532225649² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2151532225639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075766112824 + 1075766112825.

It is an arithmetic number, because the mean of its divisors is an integer number (1075766112825).

Almost surely, 2^{2151532225649} is an apocalyptic number.

It is an amenable number.

2151532225649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151532225649 is an equidigital number, since it uses as much as digits as its factorization.

2151532225649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296000, while the sum is 47.

The spelling of 2151532225649 in words is "two trillion, one hundred fifty-one billion, five hundred thirty-two million, two hundred twenty-five thousand, six hundred forty-nine".