61331943 has 16 divisors (see below), whose sum is σ = 86710400. Its totient is φ = 38452320.

The previous prime is 61331927. The next prime is 61331951. The reversal of 61331943 is 34913316.

It is not a de Polignac number, because 61331943 - 2⁴ = 61331927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61331943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61331953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4053 + ... + 11793.

It is an arithmetic number, because the mean of its divisors is an integer number (5419400).

Almost surely, 2^61331943 is an apocalyptic number.

61331943 is a deficient number, since it is larger than the sum of its proper divisors (25378457).

61331943 is a wasteful number, since it uses less digits than its factorization.

61331943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7902.

The product of its digits is 5832, while the sum is 30.

The square root of 61331943 is about 7831.4713177027. The cubic root of 61331943 is about 394.3624667360.

The spelling of 61331943 in words is "sixty-one million, three hundred thirty-one thousand, nine hundred forty-three".