61525413 has 28 divisors (see below), whose sum is σ = 94780588. Its totient is φ = 39890880.

The previous prime is 61525381. The next prime is 61525423. The reversal of 61525413 is 31452516.

61525413 is a `hidden beast` number, since 615 + 2 + 5 + 41 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47032164 + 14493249 = 6858^2 + 3807^2 .

It is not a de Polignac number, because 61525413 - 2⁵ = 61525381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61525423) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 25833 + ... + 28113.

It is an arithmetic number, because the mean of its divisors is an integer number (3385021).

Almost surely, 2^61525413 is an apocalyptic number.

It is an amenable number.

61525413 is a deficient number, since it is larger than the sum of its proper divisors (33255175).

61525413 is an equidigital number, since it uses as much as digits as its factorization.

61525413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336 (or 2321 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 61525413 is about 7843.8136770324. The cubic root of 61525413 is about 394.7767001521.

Adding to 61525413 its reverse (31452516), we get a palindrome (92977929).

The spelling of 61525413 in words is "sixty-one million, five hundred twenty-five thousand, four hundred thirteen".