553211220505 has 4 divisors (see below), whose sum is σ = 663853464612. Its totient is φ = 442568976400.

The previous prime is 553211220473. The next prime is 553211220511. The reversal of 553211220505 is 505022112355.

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 172043277961 + 381167942544 = 414781^2 + 617388^2 .

It is not a de Polignac number, because 553211220505 - 2⁵ = 553211220473 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55321122046 + ... + 55321122055.

It is an arithmetic number, because the mean of its divisors is an integer number (165963366153).

Almost surely, 2^553211220505 is an apocalyptic number.

It is an amenable number.

553211220505 is a deficient number, since it is larger than the sum of its proper divisors (110642244107).

553211220505 is a wasteful number, since it uses less digits than its factorization.

553211220505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110642244106.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 553211220505 in words is "five hundred fifty-three billion, two hundred eleven million, two hundred twenty thousand, five hundred five".