51451021454 has 64 divisors (see below), whose sum is σ = 92181888000. Its totient is φ = 21522564000.

The previous prime is 51451021429. The next prime is 51451021463. The reversal of 51451021454 is 45412015415.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51451021454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4914077 + ... + 4924535.

It is an arithmetic number, because the mean of its divisors is an integer number (1440342000).

Almost surely, 2^51451021454 is an apocalyptic number.

51451021454 is a deficient number, since it is larger than the sum of its proper divisors (40730866546).

51451021454 is a wasteful number, since it uses less digits than its factorization.

51451021454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10654 (or 10640 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 51451021454 its reverse (45412015415), we get a palindrome (96863036869).

The spelling of 51451021454 in words is "fifty-one billion, four hundred fifty-one million, twenty-one thousand, four hundred fifty-four".