53220990 has 32 divisors (see below), whose sum is σ = 129054240. Its totient is φ = 14045184.

The previous prime is 53220983. The next prime is 53220997. The reversal of 53220990 is 9902235.

It is an interprime number because it is at equal distance from previous prime (53220983) and next prime (53220997).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53220997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6235 + ... + 12054.

It is an arithmetic number, because the mean of its divisors is an integer number (4032945).

Almost surely, 2^53220990 is an apocalyptic number.

53220990 is an abundant number, since it is smaller than the sum of its proper divisors (75833250).

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

53220990 is a wasteful number, since it uses less digits than its factorization.

53220990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18396.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 53220990 is about 7295.2717564187. The cubic root of 53220990 is about 376.1499279487.

The spelling of 53220990 in words is "fifty-three million, two hundred twenty thousand, nine hundred ninety".