61523005 has 4 divisors (see below), whose sum is σ = 73827612. Its totient is φ = 49218400.

The previous prime is 61522997. The next prime is 61523009. The reversal of 61523005 is 50032516.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32330596 + 29192409 = 5686^2 + 5403^2 .

It is not a de Polignac number, because 61523005 - 2³ = 61522997 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61523009) 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, 6152296 + ... + 6152305.

It is an arithmetic number, because the mean of its divisors is an integer number (18456903).

Almost surely, 2^61523005 is an apocalyptic number.

It is an amenable number.

61523005 is a deficient number, since it is larger than the sum of its proper divisors (12304607).

61523005 is a wasteful number, since it uses less digits than its factorization.

61523005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12304606.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 61523005 is about 7843.6601787686. The cubic root of 61523005 is about 394.7715497887.

The spelling of 61523005 in words is "sixty-one million, five hundred twenty-three thousand, five".