56240412421 has 4 divisors (see below), whose sum is σ = 57301552332. Its totient is φ = 55179272512.

The previous prime is 56240412409. The next prime is 56240412427. The reversal of 56240412421 is 12421404265.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16903640196 + 39336772225 = 130014^2 + 198335^2 .

It is a cyclic number.

It is not a de Polignac number, because 56240412421 - 2²¹ = 56238315269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56240412427) 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, 530569876 + ... + 530569981.

It is an arithmetic number, because the mean of its divisors is an integer number (14325388083).

Almost surely, 2^56240412421 is an apocalyptic number.

It is an amenable number.

56240412421 is a deficient number, since it is larger than the sum of its proper divisors (1061139911).

56240412421 is a wasteful number, since it uses less digits than its factorization.

56240412421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061139910.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 56240412421 its reverse (12421404265), we get a palindrome (68661816686).

The spelling of 56240412421 in words is "fifty-six billion, two hundred forty million, four hundred twelve thousand, four hundred twenty-one".