25031002001 has 2 divisors, whose sum is σ = 25031002002. Its totient is φ = 25031002000.

The previous prime is 25031001997. The next prime is 25031002027. The reversal of 25031002001 is 10020013052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24653710225 + 377291776 = 157015^2 + 19424^2 .

It is a cyclic number.

It is not a de Polignac number, because 25031002001 - 2² = 25031001997 is a prime.

It is a super-2 number, since 2×25031002001² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25031002091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12515501000 + 12515501001.

It is an arithmetic number, because the mean of its divisors is an integer number (12515501001).

Almost surely, 2^25031002001 is an apocalyptic number.

It is an amenable number.

25031002001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25031002001 is an equidigital number, since it uses as much as digits as its factorization.

25031002001 is an odious number, because the sum of its binary digits is odd.

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

Adding to 25031002001 its reverse (10020013052), we get a palindrome (35051015053).

The spelling of 25031002001 in words is "twenty-five billion, thirty-one million, two thousand, one".