61631532 has 36 divisors (see below), whose sum is σ = 156050440. Its totient is φ = 20509632.

The previous prime is 61631519. The next prime is 61631539. The reversal of 61631532 is 23513616.

61631532 is a `hidden beast` number, since 616 + 3 + 15 + 32 = 666.

61631532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 61631496 and 61631505.

It is not an unprimeable number, because it can be changed into a prime (61631539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29928 + ... + 31920.

Almost surely, 2^61631532 is an apocalyptic number.

It is an amenable number.

61631532 is an abundant number, since it is smaller than the sum of its proper divisors (94418908).

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

61631532 is a wasteful number, since it uses less digits than its factorization.

61631532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862 (or 2857 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 61631532 is about 7850.5752655458. The cubic root of 61631532 is about 395.0035399993.

The spelling of 61631532 in words is "sixty-one million, six hundred thirty-one thousand, five hundred thirty-two".