53020145 has 8 divisors (see below), whose sum is σ = 63697704. Its totient is φ = 42367104.

The previous prime is 53020133. The next prime is 53020147. The reversal of 53020145 is 54102035.

It can be written as a sum of positive squares in 4 ways, for example, as 6330256 + 46689889 = 2516^2 + 6833^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 53020145 - 2⁶ = 53020081 is a prime.

It is a super-2 number, since 2×53020145² = 5622271551642050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53020147) 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, 974 + ... + 10343.

It is an arithmetic number, because the mean of its divisors is an integer number (7962213).

Almost surely, 2^53020145 is an apocalyptic number.

It is an amenable number.

53020145 is a deficient number, since it is larger than the sum of its proper divisors (10677559).

53020145 is a wasteful number, since it uses less digits than its factorization.

53020145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12259.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 53020145 is about 7281.4933221146. The cubic root of 53020145 is about 375.6761608254.

The spelling of 53020145 in words is "fifty-three million, twenty thousand, one hundred forty-five".