53201665 has 16 divisors (see below), whose sum is σ = 70963776. Its totient is φ = 37960000.

The previous prime is 53201651. The next prime is 53201677. The reversal of 53201665 is 56610235.

It is not a de Polignac number, because 53201665 - 2¹¹ = 53199617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6211 + ... + 12040.

It is an arithmetic number, because the mean of its divisors is an integer number (4435236).

Almost surely, 2^53201665 is an apocalyptic number.

53201665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53201665 is a deficient number, since it is larger than the sum of its proper divisors (17762111).

53201665 is a wasteful number, since it uses less digits than its factorization.

53201665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18320.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 53201665 is about 7293.9471481496. The cubic root of 53201665 is about 376.1043946772.

The spelling of 53201665 in words is "fifty-three million, two hundred one thousand, six hundred sixty-five".