51244410042451 has 4 divisors (see below), whose sum is σ = 51283617702552. Its totient is φ = 51205202382352.

The previous prime is 51244410042401. The next prime is 51244410042473. The reversal of 51244410042451 is 15424001444215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51244410042451 - 2³⁹ = 50694654228563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51244410042451.

It is not an unprimeable number, because it can be changed into a prime (51244410042401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19603828090 + ... + 19603830703.

It is an arithmetic number, because the mean of its divisors is an integer number (12820904425638).

Almost surely, 2^{51244410042451} is an apocalyptic number.

51244410042451 is a deficient number, since it is larger than the sum of its proper divisors (39207660101).

51244410042451 is a wasteful number, since it uses less digits than its factorization.

51244410042451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39207660100.

The product of its (nonzero) digits is 102400, while the sum is 37.

Adding to 51244410042451 its reverse (15424001444215), we get a palindrome (66668411486666).

The spelling of 51244410042451 in words is "fifty-one trillion, two hundred forty-four billion, four hundred ten million, forty-two thousand, four hundred fifty-one".