53521970 has 8 divisors (see below), whose sum is σ = 96339564. Its totient is φ = 21408784.

The previous prime is 53521939. The next prime is 53521973. The reversal of 53521970 is 7912535.

It can be written as a sum of positive squares in 2 ways, for example, as 53421481 + 100489 = 7309^2 + 317^2 .

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

It is not an unprimeable number, because it can be changed into a prime (53521973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2676089 + ... + 2676108.

Almost surely, 2^53521970 is an apocalyptic number.

53521970 is a deficient number, since it is larger than the sum of its proper divisors (42817594).

53521970 is a wasteful number, since it uses less digits than its factorization.

53521970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352204.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 53521970 is about 7315.8711032932. The cubic root of 53521970 is about 376.8576741144.

The spelling of 53521970 in words is "fifty-three million, five hundred twenty-one thousand, nine hundred seventy".