53660251 has 4 divisors (see below), whose sum is σ = 53833104. Its totient is φ = 53487400.

The previous prime is 53660227. The next prime is 53660261. The reversal of 53660251 is 15206635.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15206635 = 5 ⋅3041327.

It is a cyclic number.

It is not a de Polignac number, because 53660251 - 2¹⁹ = 53135963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53660261) 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, 85960 + ... + 86581.

It is an arithmetic number, because the mean of its divisors is an integer number (13458276).

Almost surely, 2^53660251 is an apocalyptic number.

53660251 is a deficient number, since it is larger than the sum of its proper divisors (172853).

53660251 is a wasteful number, since it uses less digits than its factorization.

53660251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172852.

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

The square root of 53660251 is about 7325.3157611123. The cubic root of 53660251 is about 377.1819486801.

Adding to 53660251 its reverse (15206635), we get a palindrome (68866886).

The spelling of 53660251 in words is "fifty-three million, six hundred sixty thousand, two hundred fifty-one".