31061998 has 16 divisors (see below), whose sum is σ = 53504640. Its totient is φ = 13375800.

The previous prime is 31061963. The next prime is 31062001. The reversal of 31061998 is 89916013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36738 + ... + 37573.

It is an arithmetic number, because the mean of its divisors is an integer number (3344040).

Almost surely, 2^31061998 is an apocalyptic number.

31061998 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

31061998 is a deficient number, since it is larger than the sum of its proper divisors (22442642).

31061998 is a wasteful number, since it uses less digits than its factorization.

31061998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74343.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 31061998 is about 5573.3291666651. The cubic root of 31061998 is about 314.3473444073.

The spelling of 31061998 in words is "thirty-one million, sixty-one thousand, nine hundred ninety-eight".