55425012021 has 16 divisors (see below), whose sum is σ = 82181296320. Its totient is φ = 36918432720.

The previous prime is 55425011951. The next prime is 55425012037. The reversal of 55425012021 is 12021052455.

It is not a de Polignac number, because 55425012021 - 2¹¹ = 55425009973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55425012061) 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 15 ways as a sum of consecutive naturals, for example, 844890 + ... + 908123.

It is an arithmetic number, because the mean of its divisors is an integer number (5136331020).

Almost surely, 2^55425012021 is an apocalyptic number.

It is an amenable number.

55425012021 is a deficient number, since it is larger than the sum of its proper divisors (26756284299).

55425012021 is a wasteful number, since it uses less digits than its factorization.

55425012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754193 (or 1754187 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 55425012021 its reverse (12021052455), we get a palindrome (67446064476).

The spelling of 55425012021 in words is "fifty-five billion, four hundred twenty-five million, twelve thousand, twenty-one".