51132541621 has 8 divisors (see below), whose sum is σ = 59309387840. Its totient is φ = 43173744768.

The previous prime is 51132541589. The next prime is 51132541627. The reversal of 51132541621 is 12614523115.

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

It is not a de Polignac number, because 51132541621 - 2⁵ = 51132541589 is a prime.

It is a super-3 number, since 3×51132541621³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132541627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54511836 + ... + 54512773.

It is an arithmetic number, because the mean of its divisors is an integer number (7413673480).

Almost surely, 2^51132541621 is an apocalyptic number.

It is an amenable number.

51132541621 is a deficient number, since it is larger than the sum of its proper divisors (8176846219).

51132541621 is a wasteful number, since it uses less digits than its factorization.

51132541621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109024683.

The product of its digits is 7200, while the sum is 31.

The spelling of 51132541621 in words is "fifty-one billion, one hundred thirty-two million, five hundred forty-one thousand, six hundred twenty-one".