31001240401 has 4 divisors (see below), whose sum is σ = 31026062500. Its totient is φ = 30976418304.

The previous prime is 31001240399. The next prime is 31001240411. The reversal of 31001240401 is 10404210013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24716556225 + 6284684176 = 157215^2 + 79276^2 .

It is a cyclic number.

It is not a de Polignac number, because 31001240401 - 2¹ = 31001240399 is a prime.

It is a super-2 number, since 2×31001240401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31001240411) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12409176 + ... + 12411673.

It is an arithmetic number, because the mean of its divisors is an integer number (7756515625).

Almost surely, 2^31001240401 is an apocalyptic number.

It is an amenable number.

31001240401 is a deficient number, since it is larger than the sum of its proper divisors (24822099).

31001240401 is a wasteful number, since it uses less digits than its factorization.

31001240401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24822098.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31001240401 its reverse (10404210013), we get a palindrome (41405450414).

The spelling of 31001240401 in words is "thirty-one billion, one million, two hundred forty thousand, four hundred one".