51535321442 has 8 divisors (see below), whose sum is σ = 84330526032. Its totient is φ = 23425146100.

The previous prime is 51535321433. The next prime is 51535321457. The reversal of 51535321442 is 24412353515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51535321442² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171257284 + ... + 1171257327.

It is an arithmetic number, because the mean of its divisors is an integer number (10541315754).

Almost surely, 2^51535321442 is an apocalyptic number.

51535321442 is a deficient number, since it is larger than the sum of its proper divisors (32795204590).

51535321442 is a wasteful number, since it uses less digits than its factorization.

51535321442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342514624.

The product of its digits is 72000, while the sum is 35.

Adding to 51535321442 its reverse (24412353515), we get a palindrome (75947674957).

The spelling of 51535321442 in words is "fifty-one billion, five hundred thirty-five million, three hundred twenty-one thousand, four hundred forty-two".