51031321352 has 32 divisors (see below), whose sum is σ = 104413065120. Its totient is φ = 23189207040.

The previous prime is 51031321339. The next prime is 51031321357. The reversal of 51031321352 is 25312313015.

It is a super-2 number, since 2×51031321352² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51031321357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220343 + ... + 388089.

It is an arithmetic number, because the mean of its divisors is an integer number (3262908285).

Almost surely, 2^51031321352 is an apocalyptic number.

It is an amenable number.

51031321352 is an abundant number, since it is smaller than the sum of its proper divisors (53381743768).

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

51031321352 is a wasteful number, since it uses less digits than its factorization.

51031321352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171221 (or 171217 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 51031321352 its reverse (25312313015), we get a palindrome (76343634367).

The spelling of 51031321352 in words is "fifty-one billion, thirty-one million, three hundred twenty-one thousand, three hundred fifty-two".