31250001 has 8 divisors (see below), whose sum is σ = 41995264. Its totient is φ = 20669040.

The previous prime is 31249997. The next prime is 31250017. The reversal of 31250001 is 10005213.

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

It is not a de Polignac number, because 31250001 - 2² = 31249997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31251001) 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, 40630 + ... + 41391.

It is an arithmetic number, because the mean of its divisors is an integer number (5249408).

Almost surely, 2^31250001 is an apocalyptic number.

It is an amenable number.

31250001 is a deficient number, since it is larger than the sum of its proper divisors (10745263).

31250001 is a wasteful number, since it uses less digits than its factorization.

31250001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82151.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 31250001 is about 5590.1700331922. The cubic root of 31250001 is about 314.9802658335.

Adding to 31250001 its reverse (10005213), we get a palindrome (41255214).

The spelling of 31250001 in words is "thirty-one million, two hundred fifty thousand, one".