53409375 has 60 divisors (see below), whose sum is σ = 100196712. Its totient is φ = 28350000.

The previous prime is 53409353. The next prime is 53409383. The reversal of 53409375 is 57390435.

It is not a de Polignac number, because 53409375 - 2⁸ = 53409119 is a prime.

It is a super-2 number, since 2×53409375² = 5705122675781250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 253020 + ... + 253230.

Almost surely, 2^53409375 is an apocalyptic number.

53409375 is a deficient number, since it is larger than the sum of its proper divisors (46787337).

53409375 is an frugal number, since it uses more digits than its factorization.

53409375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

The square root of 53409375 is about 7308.1717960103. The cubic root of 53409375 is about 376.5932214681.

The spelling of 53409375 in words is "fifty-three million, four hundred nine thousand, three hundred seventy-five".