61471550 has 24 divisors (see below), whose sum is σ = 130671696. Its totient is φ = 21075840.

The previous prime is 61471549. The next prime is 61471567. The reversal of 61471550 is 5517416.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87467 + ... + 88166.

It is an arithmetic number, because the mean of its divisors is an integer number (5444654).

Almost surely, 2^61471550 is an apocalyptic number.

61471550 is an abundant number, since it is smaller than the sum of its proper divisors (69200146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61471550 is a wasteful number, since it uses less digits than its factorization.

61471550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175652 (or 175647 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 61471550 is about 7840.3794551029. The cubic root of 61471550 is about 394.6614628618.

Adding to 61471550 its reverse (5517416), we get a palindrome (66988966).

The spelling of 61471550 in words is "sixty-one million, four hundred seventy-one thousand, five hundred fifty".