51223443510 has 32 divisors (see below), whose sum is σ = 122986073952. Its totient is φ = 13654050560.

The previous prime is 51223443503. The next prime is 51223443517. The reversal of 51223443510 is 1534432215.

It is an interprime number because it is at equal distance from previous prime (51223443503) and next prime (51223443517).

It is a super-2 number, since 2×51223443510² (a number of 22 digits) contains 22 as substring.

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 (51223443517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270351 + ... + 418970.

It is an arithmetic number, because the mean of its divisors is an integer number (3843314811).

Almost surely, 2^51223443510 is an apocalyptic number.

51223443510 is an abundant number, since it is smaller than the sum of its proper divisors (71762630442).

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

51223443510 is a wasteful number, since it uses less digits than its factorization.

51223443510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691808.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 51223443510 its reverse (1534432215), we get a palindrome (52757875725).

The spelling of 51223443510 in words is "fifty-one billion, two hundred twenty-three million, four hundred forty-three thousand, five hundred ten".