61571157 has 8 divisors (see below), whose sum is σ = 82848480. Its totient is φ = 40670640.

The previous prime is 61571137. The next prime is 61571171. The reversal of 61571157 is 75117516.

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

It is not a de Polignac number, because 61571157 - 2¹⁶ = 61505621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61571137) 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, 93819 + ... + 94472.

It is an arithmetic number, because the mean of its divisors is an integer number (10356060).

Almost surely, 2^61571157 is an apocalyptic number.

It is an amenable number.

61571157 is a deficient number, since it is larger than the sum of its proper divisors (21277323).

61571157 is a wasteful number, since it uses less digits than its factorization.

61571157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188403.

The product of its digits is 7350, while the sum is 33.

The square root of 61571157 is about 7846.7290637564. The cubic root of 61571157 is about 394.8745144309.

The spelling of 61571157 in words is "sixty-one million, five hundred seventy-one thousand, one hundred fifty-seven".