51023063550 has 24 divisors (see below), whose sum is σ = 126537197976. Its totient is φ = 13606150240.

The previous prime is 51023063503. The next prime is 51023063551. The reversal of 51023063550 is 5536032015.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023063551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170076729 + ... + 170077028.

It is an arithmetic number, because the mean of its divisors is an integer number (5272383249).

Almost surely, 2^51023063550 is an apocalyptic number.

51023063550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51023063550 is an abundant number, since it is smaller than the sum of its proper divisors (75514134426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51023063550 is a wasteful number, since it uses less digits than its factorization.

51023063550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340153772 (or 340153767 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 51023063550 its reverse (5536032015), we get a palindrome (56559095565).

The spelling of 51023063550 in words is "fifty-one billion, twenty-three million, sixty-three thousand, five hundred fifty".