61542313 has 4 divisors (see below), whose sum is σ = 70334080. Its totient is φ = 52750548.

The previous prime is 61542307. The next prime is 61542323. The reversal of 61542313 is 31324516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61542313 - 2⁹ = 61541801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61542323) 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, 4395873 + ... + 4395886.

It is an arithmetic number, because the mean of its divisors is an integer number (17583520).

Almost surely, 2^61542313 is an apocalyptic number.

It is an amenable number.

61542313 is a deficient number, since it is larger than the sum of its proper divisors (8791767).

61542313 is an equidigital number, since it uses as much as digits as its factorization.

61542313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8791766.

The product of its digits is 2160, while the sum is 25.

The square root of 61542313 is about 7844.8908851558. The cubic root of 61542313 is about 394.8128430245.

Adding to 61542313 its reverse (31324516), we get a palindrome (92866829).

The spelling of 61542313 in words is "sixty-one million, five hundred forty-two thousand, three hundred thirteen".