61332105531 has 4 divisors (see below), whose sum is σ = 81776140712. Its totient is φ = 40888070352.

The previous prime is 61332105479. The next prime is 61332105559. The reversal of 61332105531 is 13550123316.

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

It is not a de Polignac number, because 61332105531 - 2⁹ = 61332105019 is a prime.

It is a super-2 number, since 2×61332105531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61332105931) 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, 10222017586 + ... + 10222017591.

It is an arithmetic number, because the mean of its divisors is an integer number (20444035178).

Almost surely, 2^61332105531 is an apocalyptic number.

61332105531 is a deficient number, since it is larger than the sum of its proper divisors (20444035181).

61332105531 is a wasteful number, since it uses less digits than its factorization.

61332105531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20444035180.

The product of its (nonzero) digits is 8100, while the sum is 30.

Adding to 61332105531 its reverse (13550123316), we get a palindrome (74882228847).

The spelling of 61332105531 in words is "sixty-one billion, three hundred thirty-two million, one hundred five thousand, five hundred thirty-one".