25210101 has 16 divisors (see below), whose sum is σ = 38495744. Its totient is φ = 14375664.

The previous prime is 25210091. The next prime is 25210109. The reversal of 25210101 is 10101252.

It is not a de Polignac number, because 25210101 - 2¹⁵ = 25177333 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25210109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12570 + ... + 14436.

It is an arithmetic number, because the mean of its divisors is an integer number (2405984).

Almost surely, 2^25210101 is an apocalyptic number.

25210101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25210101 is a deficient number, since it is larger than the sum of its proper divisors (13285643).

25210101 is a wasteful number, since it uses less digits than its factorization.

25210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 25210101 is about 5020.9661420886. The cubic root of 25210101 is about 293.2186085740.

Adding to 25210101 its reverse (10101252), we get a palindrome (35311353).

It can be divided in two parts, 252 and 10101, that multiplied together give a palindrome (2545452).

The spelling of 25210101 in words is "twenty-five million, two hundred ten thousand, one hundred one".