51542121010 has 8 divisors (see below), whose sum is σ = 92775817836. Its totient is φ = 20616848400.

The previous prime is 51542120977. The next prime is 51542121053. The reversal of 51542121010 is 1012124515.

It can be written as a sum of positive squares in 2 ways, for example, as 46495865641 + 5046255369 = 215629^2 + 71037^2 .

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

It is a super-3 number, since 3×51542121010³ (a number of 33 digits) contains 333 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, 2577106041 + ... + 2577106060.

Almost surely, 2^51542121010 is an apocalyptic number.

51542121010 is a deficient number, since it is larger than the sum of its proper divisors (41233696826).

51542121010 is a wasteful number, since it uses less digits than its factorization.

51542121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5154212108.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 51542121010 its reverse (1012124515), we get a palindrome (52554245525).

The spelling of 51542121010 in words is "fifty-one billion, five hundred forty-two million, one hundred twenty-one thousand, ten".