31100107 has 4 divisors (see below), whose sum is σ = 31126960. Its totient is φ = 31073256.

The previous prime is 31100101. The next prime is 31100149. The reversal of 31100107 is 70100113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31100107 - 2¹¹ = 31098059 is a prime.

It is a super-2 number, since 2×31100107² = 1934433310822898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31100101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11607 + ... + 14032.

It is an arithmetic number, because the mean of its divisors is an integer number (7781740).

Almost surely, 2^31100107 is an apocalyptic number.

31100107 is a deficient number, since it is larger than the sum of its proper divisors (26853).

31100107 is a wasteful number, since it uses less digits than its factorization.

31100107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26852.

The product of its (nonzero) digits is 21, while the sum is 13.

The square root of 31100107 is about 5576.7469908541. The cubic root of 31100107 is about 314.4758461992.

The spelling of 31100107 in words is "thirty-one million, one hundred thousand, one hundred seven".