15420545254522 has 16 divisors (see below), whose sum is σ = 23136859193760. Its totient is φ = 7708259090448.

The previous prime is 15420545254493. The next prime is 15420545254529. The reversal of 15420545254522 is 22545254502451.

It is a happy number.

It is a super-2 number, since 2×15420545254522² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15420545254529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158960629 + ... + 159057607.

It is an arithmetic number, because the mean of its divisors is an integer number (1446053699610).

Almost surely, 2^{15420545254522} is an apocalyptic number.

15420545254522 is a deficient number, since it is larger than the sum of its proper divisors (7716313939238).

15420545254522 is a wasteful number, since it uses less digits than its factorization.

15420545254522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116925.

The product of its (nonzero) digits is 3200000, while the sum is 46.

Adding to 15420545254522 its reverse (22545254502451), we get a palindrome (37965799756973).

The spelling of 15420545254522 in words is "fifteen trillion, four hundred twenty billion, five hundred forty-five million, two hundred fifty-four thousand, five hundred twenty-two".