2551024781 has 8 divisors (see below), whose sum is σ = 2611367424. Its totient is φ = 2490934960.

The previous prime is 2551024769. The next prime is 2551024823. The reversal of 2551024781 is 1874201552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2551024781 is a prime.

It is a super-2 number, since 2×2551024781² = 13015454866552195922, 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 (2551024741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42710 + ... + 83223.

It is an arithmetic number, because the mean of its divisors is an integer number (326420928).

Almost surely, 2^2551024781 is an apocalyptic number.

It is an amenable number.

2551024781 is a deficient number, since it is larger than the sum of its proper divisors (60342643).

2551024781 is a wasteful number, since it uses less digits than its factorization.

2551024781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126411.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 2551024781 is about 50507.6705164671. The cubic root of 2551024781 is about 1366.3801969929.

The spelling of 2551024781 in words is "two billion, five hundred fifty-one million, twenty-four thousand, seven hundred eighty-one".