21315341425 has 96 divisors (see below), whose sum is σ = 33397862400. Its totient is φ = 13157717760.

The previous prime is 21315341413. The next prime is 21315341449. The reversal of 21315341425 is 52414351312.

It is not a de Polignac number, because 21315341425 - 2⁵ = 21315341393 is a prime.

It is a super-3 number, since 3×21315341425³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12770491 + ... + 12772159.

It is an arithmetic number, because the mean of its divisors is an integer number (347894400).

Almost surely, 2^21315341425 is an apocalyptic number.

21315341425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21315341425 is a deficient number, since it is larger than the sum of its proper divisors (12082520975).

21315341425 is a wasteful number, since it uses less digits than its factorization.

21315341425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895 (or 1890 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

Adding to 21315341425 its reverse (52414351312), we get a palindrome (73729692737).

The spelling of 21315341425 in words is "twenty-one billion, three hundred fifteen million, three hundred forty-one thousand, four hundred twenty-five".