25213510406442 has 8 divisors (see below), whose sum is σ = 50427020812896. Its totient is φ = 8404503468812.

The previous prime is 25213510406419. The next prime is 25213510406467. The reversal of 25213510406442 is 24460401531252.

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

25213510406442 is an admirable number.

It is a super-2 number, since 2×25213510406442² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25213510406442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101125867198 + ... + 2101125867209.

It is an arithmetic number, because the mean of its divisors is an integer number (6303377601612).

Almost surely, 2^{25213510406442} is an apocalyptic number.

25213510406442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25213510406442 is a wasteful number, since it uses less digits than its factorization.

25213510406442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202251734412.

The product of its (nonzero) digits is 230400, while the sum is 39.

Adding to 25213510406442 its reverse (24460401531252), we get a palindrome (49673911937694).

The spelling of 25213510406442 in words is "twenty-five trillion, two hundred thirteen billion, five hundred ten million, four hundred six thousand, four hundred forty-two".