31201001 has 8 divisors (see below), whose sum is σ = 35577864. Its totient is φ = 27106560.

The previous prime is 31200991. The next prime is 31201007. The reversal of 31201001 is 10010213.

It can be written as a sum of positive squares in 4 ways, for example, as 7425625 + 23775376 = 2725^2 + 4876^2 .

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

It is not a de Polignac number, because 31201001 - 2⁶ = 31200937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31201001.

It is not an unprimeable number, because it can be changed into a prime (31201007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70370 + ... + 70811.

It is an arithmetic number, because the mean of its divisors is an integer number (4447233).

Almost surely, 2^31201001 is an apocalyptic number.

It is an amenable number.

31201001 is a deficient number, since it is larger than the sum of its proper divisors (4376863).

31201001 is a wasteful number, since it uses less digits than its factorization.

31201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141211.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 31201001 is about 5585.7856206625. The cubic root of 31201001 is about 314.8155500317.

Adding to 31201001 its reverse (10010213), we get a palindrome (41211214).

The spelling of 31201001 in words is "thirty-one million, two hundred one thousand, one".