42020251544 has 32 divisors (see below), whose sum is σ = 80734222800. Its totient is φ = 20491438080.

The previous prime is 42020251541. The next prime is 42020251561. The reversal of 42020251544 is 44515202024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020251541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168667 + ... + 1204085.

Almost surely, 2^42020251544 is an apocalyptic number.

It is an amenable number.

42020251544 is a deficient number, since it is larger than the sum of its proper divisors (38713971256).

42020251544 is a wasteful number, since it uses less digits than its factorization.

42020251544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39083 (or 39079 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 42020251544 its reverse (44515202024), we get a palindrome (86535453568).

The spelling of 42020251544 in words is "forty-two billion, twenty million, two hundred fifty-one thousand, five hundred forty-four".