53211018 has 16 divisors (see below), whose sum is σ = 121625280. Its totient is φ = 15203136.

The previous prime is 53211013. The next prime is 53211031. The reversal of 53211018 is 81011235.

It is a super-4 number, since 4×53211018⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 53210985 and 53211003.

It is not an unprimeable number, because it can be changed into a prime (53211013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633423 + ... + 633506.

It is an arithmetic number, because the mean of its divisors is an integer number (7601580).

Almost surely, 2^53211018 is an apocalyptic number.

53211018 is an abundant number, since it is smaller than the sum of its proper divisors (68414262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53211018 is a wasteful number, since it uses less digits than its factorization.

53211018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266941.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 53211018 is about 7294.5882680245. The cubic root of 53211018 is about 376.1264334503.

The spelling of 53211018 in words is "fifty-three million, two hundred eleven thousand, eighteen".