31102401 has 16 divisors (see below), whose sum is σ = 47901888. Its totient is φ = 17740800.

The previous prime is 31102369. The next prime is 31102403. The reversal of 31102401 is 10420113.

It is a happy number.

It is not a de Polignac number, because 31102401 - 2⁵ = 31102369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31102403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27160 + ... + 28281.

It is an arithmetic number, because the mean of its divisors is an integer number (2993868).

Almost surely, 2^31102401 is an apocalyptic number.

It is an amenable number.

31102401 is a deficient number, since it is larger than the sum of its proper divisors (16799487).

31102401 is a wasteful number, since it uses less digits than its factorization.

31102401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55472.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 31102401 is about 5576.9526625210. The cubic root of 31102401 is about 314.4835781110.

Adding to 31102401 its reverse (10420113), we get a palindrome (41522514).

The spelling of 31102401 in words is "thirty-one million, one hundred two thousand, four hundred one".