61013525 has 6 divisors (see below), whose sum is σ = 75656802. Its totient is φ = 48810800.

The previous prime is 61013521. The next prime is 61013531. The reversal of 61013525 is 52531016.

It can be written as a sum of positive squares in 3 ways, for example, as 3147076 + 57866449 = 1774^2 + 7607^2 .

It is not a de Polignac number, because 61013525 - 2² = 61013521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61013525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61013521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1220246 + ... + 1220295.

It is an arithmetic number, because the mean of its divisors is an integer number (12609467).

Almost surely, 2^61013525 is an apocalyptic number.

It is an amenable number.

61013525 is a deficient number, since it is larger than the sum of its proper divisors (14643277).

61013525 is a wasteful number, since it uses less digits than its factorization.

61013525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440551 (or 2440546 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 61013525 is about 7811.1154773182. The cubic root of 61013525 is about 393.6788096709.

The spelling of 61013525 in words is "sixty-one million, thirteen thousand, five hundred twenty-five".