540022252421 has 4 divisors (see below), whose sum is σ = 541149648000. Its totient is φ = 538894856844.

The previous prime is 540022252411. The next prime is 540022252453. The reversal of 540022252421 is 124252220045.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 540022252421 - 2³⁴ = 522842383237 is a prime.

It is a super-2 number, since 2×540022252421² (a number of 24 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 (540022252411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563697071 + ... + 563698028.

It is an arithmetic number, because the mean of its divisors is an integer number (135287412000).

Almost surely, 2^540022252421 is an apocalyptic number.

It is an amenable number.

540022252421 is a deficient number, since it is larger than the sum of its proper divisors (1127395579).

540022252421 is a wasteful number, since it uses less digits than its factorization.

540022252421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127395578.

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

Adding to 540022252421 its reverse (124252220045), we get a palindrome (664274472466).

The spelling of 540022252421 in words is "five hundred forty billion, twenty-two million, two hundred fifty-two thousand, four hundred twenty-one".