31401005 has 16 divisors (see below), whose sum is σ = 38372400. Its totient is φ = 24665088.

The previous prime is 31400983. The next prime is 31401011. The reversal of 31401005 is 50010413.

It can be written as a sum of positive squares in 8 ways, for example, as 9815689 + 21585316 = 3133^2 + 4646^2 .

It is a cyclic number.

It is not a de Polignac number, because 31401005 - 2¹⁰ = 31399981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83999 + ... + 84371.

It is an arithmetic number, because the mean of its divisors is an integer number (2398275).

Almost surely, 2^31401005 is an apocalyptic number.

It is an amenable number.

31401005 is a deficient number, since it is larger than the sum of its proper divisors (6971395).

31401005 is a wasteful number, since it uses less digits than its factorization.

31401005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 31401005 is about 5603.6599647016. The cubic root of 31401005 is about 315.4867924781.

Adding to 31401005 its reverse (50010413), we get a palindrome (81411418).

The spelling of 31401005 in words is "thirty-one million, four hundred one thousand, five".