31242201 has 8 divisors (see below), whose sum is σ = 42243264. Its totient is φ = 20534640.

The previous prime is 31242191. The next prime is 31242217. The reversal of 31242201 is 10224213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31242201 - 2¹³ = 31234009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31252201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73126 + ... + 73551.

It is an arithmetic number, because the mean of its divisors is an integer number (5280408).

Almost surely, 2^31242201 is an apocalyptic number.

It is an amenable number.

31242201 is a deficient number, since it is larger than the sum of its proper divisors (11001063).

31242201 is a wasteful number, since it uses less digits than its factorization.

31242201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146751.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 31242201 is about 5589.4723364554. The cubic root of 31242201 is about 314.9540572956.

Adding to 31242201 its reverse (10224213), we get a palindrome (41466414).

The spelling of 31242201 in words is "thirty-one million, two hundred forty-two thousand, two hundred one".