61317157 has 8 divisors (see below), whose sum is σ = 66960000. Its totient is φ = 55685760.

The previous prime is 61317143. The next prime is 61317167. The reversal of 61317157 is 75171316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61317157 - 2¹⁵ = 61284389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61317167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11508 + ... + 15970.

It is an arithmetic number, because the mean of its divisors is an integer number (8370000).

Almost surely, 2^61317157 is an apocalyptic number.

It is an amenable number.

61317157 is a deficient number, since it is larger than the sum of its proper divisors (5642843).

61317157 is a wasteful number, since it uses less digits than its factorization.

61317157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723.

The product of its digits is 4410, while the sum is 31.

The square root of 61317157 is about 7830.5272491704. The cubic root of 61317157 is about 394.3307730171.

The spelling of 61317157 in words is "sixty-one million, three hundred seventeen thousand, one hundred fifty-seven".