55245040521 has 32 divisors (see below), whose sum is σ = 82838039040. Its totient is φ = 32463388800.

The previous prime is 55245040507. The next prime is 55245040537. The reversal of 55245040521 is 12504054255.

It is not a de Polignac number, because 55245040521 - 2⁶ = 55245040457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (55245040541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52215 + ... + 336476.

It is an arithmetic number, because the mean of its divisors is an integer number (2588688720).

Almost surely, 2^55245040521 is an apocalyptic number.

It is an amenable number.

55245040521 is a deficient number, since it is larger than the sum of its proper divisors (27592998519).

55245040521 is a wasteful number, since it uses less digits than its factorization.

55245040521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388837.

The product of its (nonzero) digits is 40000, while the sum is 33.

Adding to 55245040521 its reverse (12504054255), we get a palindrome (67749094776).

The spelling of 55245040521 in words is "fifty-five billion, two hundred forty-five million, forty thousand, five hundred twenty-one".