25213421452 has 24 divisors (see below), whose sum is σ = 44814857472. Its totient is φ = 12409731600.

The previous prime is 25213421447. The next prime is 25213421461. The reversal of 25213421452 is 25412431252.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113577 + ... + 251647.

It is an arithmetic number, because the mean of its divisors is an integer number (1867285728).

Almost surely, 2^25213421452 is an apocalyptic number.

It is an amenable number.

25213421452 is a deficient number, since it is larger than the sum of its proper divisors (19601436020).

25213421452 is a wasteful number, since it uses less digits than its factorization.

25213421452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138789 (or 138787 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The spelling of 25213421452 in words is "twenty-five billion, two hundred thirteen million, four hundred twenty-one thousand, four hundred fifty-two".