2451247551 has 24 divisors (see below), whose sum is σ = 3813729920. Its totient is φ = 1512148176.

The previous prime is 2451247537. The next prime is 2451247559. The reversal of 2451247551 is 1557421542.

2451247551 is a `hidden beast` number, since 24 + 512 + 4 + 75 + 51 = 666.

2451247551 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2451247551 - 2⁷ = 2451247423 is a prime.

It is a super-2 number, since 2×2451247551² = 12017229112566995202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2451247559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159331 + ... + 174036.

Almost surely, 2^2451247551 is an apocalyptic number.

2451247551 is a deficient number, since it is larger than the sum of its proper divisors (1362482369).

2451247551 is a wasteful number, since it uses less digits than its factorization.

2451247551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333435 (or 333432 counting only the distinct ones).

The product of its digits is 56000, while the sum is 36.

The square root of 2451247551 is about 49510.0752473676. The cubic root of 2451247551 is about 1348.3285305421.

The spelling of 2451247551 in words is "two billion, four hundred fifty-one million, two hundred forty-seven thousand, five hundred fifty-one".