2451147521 has 2 divisors, whose sum is σ = 2451147522. Its totient is φ = 2451147520.

The previous prime is 2451147511. The next prime is 2451147553. The reversal of 2451147521 is 1257411542.

It is an a-pointer prime, because the next prime (2451147553) can be obtained adding 2451147521 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2436409600 + 14737921 = 49360^2 + 3839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2451147521 is a prime.

It is not a weakly prime, because it can be changed into another prime (2451147511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1225573760 + 1225573761.

It is an arithmetic number, because the mean of its divisors is an integer number (1225573761).

Almost surely, 2^2451147521 is an apocalyptic number.

It is an amenable number.

2451147521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2451147521 is an equidigital number, since it uses as much as digits as its factorization.

2451147521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 32.

The square root of 2451147521 is about 49509.0650386371. The cubic root of 2451147521 is about 1348.3101895225.

The spelling of 2451147521 in words is "two billion, four hundred fifty-one million, one hundred forty-seven thousand, five hundred twenty-one".