55020531505 has 8 divisors (see below), whose sum is σ = 68154465024. Its totient is φ = 42596540400.

The previous prime is 55020531487. The next prime is 55020531523. The reversal of 55020531505 is 50513502055.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55020531487) and next prime (55020531523).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55020531505 - 2²³ = 55012142897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177485431 + ... + 177485740.

It is an arithmetic number, because the mean of its divisors is an integer number (8519308128).

Almost surely, 2^55020531505 is an apocalyptic number.

It is an amenable number.

55020531505 is a deficient number, since it is larger than the sum of its proper divisors (13133933519).

55020531505 is a wasteful number, since it uses less digits than its factorization.

55020531505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354971207.

The product of its (nonzero) digits is 18750, while the sum is 31.

The spelling of 55020531505 in words is "fifty-five billion, twenty million, five hundred thirty-one thousand, five hundred five".