61331372 has 12 divisors (see below), whose sum is σ = 107522520. Its totient is φ = 30610656.

The previous prime is 61331371. The next prime is 61331399. The reversal of 61331372 is 27313316.

It is a super-3 number, since 3×61331372³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61331371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11198 + ... + 15749.

It is an arithmetic number, because the mean of its divisors is an integer number (8960210).

Almost surely, 2^61331372 is an apocalyptic number.

It is an amenable number.

61331372 is a deficient number, since it is larger than the sum of its proper divisors (46191148).

61331372 is a wasteful number, since it uses less digits than its factorization.

61331372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27520 (or 27518 counting only the distinct ones).

The product of its digits is 2268, while the sum is 26.

The square root of 61331372 is about 7831.4348621437. The cubic root of 61331372 is about 394.3612428949.

Adding to 61331372 its reverse (27313316), we get a palindrome (88644688).

The spelling of 61331372 in words is "sixty-one million, three hundred thirty-one thousand, three hundred seventy-two".