53525615 has 16 divisors (see below), whose sum is σ = 75460896. Its totient is φ = 35932800.

The previous prime is 53525611. The next prime is 53525617. The reversal of 53525615 is 51652535.

It is not a de Polignac number, because 53525615 - 2² = 53525611 is a prime.

It is a super-2 number, since 2×53525615² = 5729982922256450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53525611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36716 + ... + 38145.

It is an arithmetic number, because the mean of its divisors is an integer number (4716306).

Almost surely, 2^53525615 is an apocalyptic number.

53525615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

53525615 is a deficient number, since it is larger than the sum of its proper divisors (21935281).

53525615 is a wasteful number, since it uses less digits than its factorization.

53525615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74890.

The product of its digits is 22500, while the sum is 32.

The square root of 53525615 is about 7316.1202149773. The cubic root of 53525615 is about 376.8662289504.

Subtracting from 53525615 its reverse (51652535), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 53525615 in words is "fifty-three million, five hundred twenty-five thousand, six hundred fifteen".