15425034421 has 4 divisors (see below), whose sum is σ = 15437566144. Its totient is φ = 15412502700.

The previous prime is 15425034409. The next prime is 15425034463. The reversal of 15425034421 is 12443052451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15425034421 - 2¹¹ = 15425032373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15425034491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6264015 + ... + 6266476.

It is an arithmetic number, because the mean of its divisors is an integer number (3859391536).

Almost surely, 2^15425034421 is an apocalyptic number.

It is an amenable number.

15425034421 is a deficient number, since it is larger than the sum of its proper divisors (12531723).

15425034421 is a wasteful number, since it uses less digits than its factorization.

15425034421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12531722.

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

Adding to 15425034421 its reverse (12443052451), we get a palindrome (27868086872).

The spelling of 15425034421 in words is "fifteen billion, four hundred twenty-five million, thirty-four thousand, four hundred twenty-one".