15420153452225 has 24 divisors (see below), whose sum is σ = 19151694600000. Its totient is φ = 12316329023040.

The previous prime is 15420153452183. The next prime is 15420153452237. The reversal of 15420153452225 is 52225435102451.

It is not a de Polignac number, because 15420153452225 - 2⁶ = 15420153452161 is a prime.

It is a super-2 number, since 2×15420153452225² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39868316 + ... + 40253234.

It is an arithmetic number, because the mean of its divisors is an integer number (797987275000).

Almost surely, 2^{15420153452225} is an apocalyptic number.

It is an amenable number.

15420153452225 is a deficient number, since it is larger than the sum of its proper divisors (3731541147775).

15420153452225 is a wasteful number, since it uses less digits than its factorization.

15420153452225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387497 (or 387492 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 41.

Adding to 15420153452225 its reverse (52225435102451), we get a palindrome (67645588554676).

The spelling of 15420153452225 in words is "fifteen trillion, four hundred twenty billion, one hundred fifty-three million, four hundred fifty-two thousand, two hundred twenty-five".