25571013 has 16 divisors (see below), whose sum is σ = 37343040. Its totient is φ = 15467904.

The previous prime is 25570997. The next prime is 25571023. The reversal of 25571013 is 31017552.

It is not a de Polignac number, because 25571013 - 2⁴ = 25570997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25571023) 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, 3256 + ... + 7857.

It is an arithmetic number, because the mean of its divisors is an integer number (2333940).

Almost surely, 2^25571013 is an apocalyptic number.

It is an amenable number.

25571013 is a deficient number, since it is larger than the sum of its proper divisors (11772027).

25571013 is a wasteful number, since it uses less digits than its factorization.

25571013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11188.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 25571013 is about 5056.7789154757. The cubic root of 25571013 is about 294.6112393159.

Adding to 25571013 its reverse (31017552), we get a palindrome (56588565).

It can be divided in two parts, 2557 and 1013, that added together give a triangular number (3570 = T₈₄).

The spelling of 25571013 in words is "twenty-five million, five hundred seventy-one thousand, thirteen".