31402201 has 4 divisors (see below), whose sum is σ = 31416804. Its totient is φ = 31387600.

The previous prime is 31402183. The next prime is 31402207. The reversal of 31402201 is 10220413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10220413 = 7 ⋅1460059.

It can be written as a sum of positive squares in 2 ways, for example, as 28515600 + 2886601 = 5340^2 + 1699^2 .

It is a cyclic number.

It is not a de Polignac number, because 31402201 - 2⁷ = 31402073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31402207) 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, 3370 + ... + 8611.

It is an arithmetic number, because the mean of its divisors is an integer number (7854201).

Almost surely, 2^31402201 is an apocalyptic number.

It is an amenable number.

31402201 is a deficient number, since it is larger than the sum of its proper divisors (14603).

31402201 is a wasteful number, since it uses less digits than its factorization.

31402201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14602.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 31402201 is about 5603.7666796540. The cubic root of 31402201 is about 315.4907978426.

Adding to 31402201 its reverse (10220413), we get a palindrome (41622614).

The spelling of 31402201 in words is "thirty-one million, four hundred two thousand, two hundred one".