61542317 has 4 divisors (see below), whose sum is σ = 62851776. Its totient is φ = 60232860.

The previous prime is 61542307. The next prime is 61542323. The reversal of 61542317 is 71324516.

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 61542317 - 2⁶ = 61542253 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 61542317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61542307) 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, 654659 + ... + 654752.

It is an arithmetic number, because the mean of its divisors is an integer number (15712944).

Almost surely, 2^61542317 is an apocalyptic number.

It is an amenable number.

61542317 is a deficient number, since it is larger than the sum of its proper divisors (1309459).

61542317 is a wasteful number, since it uses less digits than its factorization.

61542317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309458.

The product of its digits is 5040, while the sum is 29.

The square root of 61542317 is about 7844.8911400988. The cubic root of 61542317 is about 394.8128515782.

The spelling of 61542317 in words is "sixty-one million, five hundred forty-two thousand, three hundred seventeen".