51242225340 has 48 divisors (see below), whose sum is σ = 143936680608. Its totient is φ = 13620931584.

The previous prime is 51242225339. The next prime is 51242225371. The reversal of 51242225340 is 4352224215.

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

It is a junction number, because it is equal to n+sod(n) for n = 51242225298 and 51242225307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1345497 + ... + 1383056.

It is an arithmetic number, because the mean of its divisors is an integer number (2998680846).

Almost surely, 2^51242225340 is an apocalyptic number.

It is an amenable number.

51242225340 is an abundant number, since it is smaller than the sum of its proper divisors (92694455268).

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

51242225340 is a wasteful number, since it uses less digits than its factorization.

51242225340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728878 (or 2728876 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 51242225340 its reverse (4352224215), we get a palindrome (55594449555).

The spelling of 51242225340 in words is "fifty-one billion, two hundred forty-two million, two hundred twenty-five thousand, three hundred forty".