31331220103 has 8 divisors (see below), whose sum is σ = 32798578176. Its totient is φ = 29872623000.

The previous prime is 31331220101. The next prime is 31331220113. The reversal of 31331220103 is 30102213313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31331220103 - 2¹ = 31331220101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331220101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2182923 + ... + 2197228.

It is an arithmetic number, because the mean of its divisors is an integer number (4099822272).

Almost surely, 2^31331220103 is an apocalyptic number.

31331220103 is a deficient number, since it is larger than the sum of its proper divisors (1467358073).

31331220103 is a wasteful number, since it uses less digits than its factorization.

31331220103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380485.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31331220103 its reverse (30102213313), we get a palindrome (61433433416).

It can be divided in two parts, 3133 and 1220103, that added together give a square (1223236 = 1106²).

The spelling of 31331220103 in words is "thirty-one billion, three hundred thirty-one million, two hundred twenty thousand, one hundred three".