61581352 has 32 divisors (see below), whose sum is σ = 133560000. Its totient is φ = 26072064.

The previous prime is 61581349. The next prime is 61581379. The reversal of 61581352 is 25318516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1977 + ... + 11272.

It is an arithmetic number, because the mean of its divisors is an integer number (4173750).

Almost surely, 2^61581352 is an apocalyptic number.

It is an amenable number.

61581352 is an abundant number, since it is smaller than the sum of its proper divisors (71978648).

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

61581352 is a wasteful number, since it uses less digits than its factorization.

61581352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13345 (or 13341 counting only the distinct ones).

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

The square root of 61581352 is about 7847.3786706135. The cubic root of 61581352 is about 394.8963077710.

Adding to 61581352 its reverse (25318516), we get a palindrome (86899868).

The spelling of 61581352 in words is "sixty-one million, five hundred eighty-one thousand, three hundred fifty-two".