25613031 has 8 divisors (see below), whose sum is σ = 34194160. Its totient is φ = 17053632.

The previous prime is 25613009. The next prime is 25613039. The reversal of 25613031 is 13031652.

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

It is not a de Polignac number, because 25613031 - 2⁶ = 25612967 is a prime.

It is a super-2 number, since 2×25613031² = 1312054714013922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25612989 and 25613007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25613039) 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, 2446 + ... + 7563.

It is an arithmetic number, because the mean of its divisors is an integer number (4274270).

Almost surely, 2^25613031 is an apocalyptic number.

25613031 is a deficient number, since it is larger than the sum of its proper divisors (8581129).

25613031 is a wasteful number, since it uses less digits than its factorization.

25613031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10865.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 25613031 is about 5060.9318311947. The cubic root of 25613031 is about 294.7725182988.

Adding to 25613031 its reverse (13031652), we get a palindrome (38644683).

The spelling of 25613031 in words is "twenty-five million, six hundred thirteen thousand, thirty-one".