1542512225021 has 16 divisors (see below), whose sum is σ = 1590313118976. Its totient is φ = 1495340161536.

The previous prime is 1542512224991. The next prime is 1542512225047. The reversal of 1542512225021 is 1205222152451.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542512225021 is a prime.

It is a super-2 number, since 2×1542512225021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542512225071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36071765 + ... + 36114501.

It is an arithmetic number, because the mean of its divisors is an integer number (99394569936).

Almost surely, 2^{1542512225021} is an apocalyptic number.

It is an amenable number.

1542512225021 is a deficient number, since it is larger than the sum of its proper divisors (47800893955).

1542512225021 is a wasteful number, since it uses less digits than its factorization.

1542512225021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50068.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 1542512225021 its reverse (1205222152451), we get a palindrome (2747734377472).

The spelling of 1542512225021 in words is "one trillion, five hundred forty-two billion, five hundred twelve million, two hundred twenty-five thousand, twenty-one".