61415523 has 32 divisors (see below), whose sum is σ = 100654400. Its totient is φ = 36764928.

The previous prime is 61415521. The next prime is 61415527. The reversal of 61415523 is 32551416.

It is not a de Polignac number, because 61415523 - 2¹ = 61415521 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 not an unprimeable number, because it can be changed into a prime (61415521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10623 + ... + 15351.

It is an arithmetic number, because the mean of its divisors is an integer number (3145450).

Almost surely, 2^61415523 is an apocalyptic number.

61415523 is a deficient number, since it is larger than the sum of its proper divisors (39238877).

61415523 is a wasteful number, since it uses less digits than its factorization.

61415523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4788 (or 4782 counting only the distinct ones).

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

The square root of 61415523 is about 7836.8056630237. The cubic root of 61415523 is about 394.5415243486.

Adding to 61415523 its reverse (32551416), we get a palindrome (93966939).

It can be divided in two parts, 6141 and 5523, that added together give a square (11664 = 108²).

The spelling of 61415523 in words is "sixty-one million, four hundred fifteen thousand, five hundred twenty-three".