51552015531 has 4 divisors (see below), whose sum is σ = 68736020712. Its totient is φ = 34368010352.

The previous prime is 51552015527. The next prime is 51552015583. The reversal of 51552015531 is 13551025515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51552015531 - 2² = 51552015527 is a prime.

It is a super-2 number, since 2×51552015531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51552015492 and 51552015501.

It is not an unprimeable number, because it can be changed into a prime (51552015331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8592002586 + ... + 8592002591.

It is an arithmetic number, because the mean of its divisors is an integer number (17184005178).

Almost surely, 2^51552015531 is an apocalyptic number.

51552015531 is a deficient number, since it is larger than the sum of its proper divisors (17184005181).

51552015531 is a wasteful number, since it uses less digits than its factorization.

51552015531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17184005180.

The product of its (nonzero) digits is 18750, while the sum is 33.

The spelling of 51552015531 in words is "fifty-one billion, five hundred fifty-two million, fifteen thousand, five hundred thirty-one".