61157267 has 4 divisors (see below), whose sum is σ = 61173456. Its totient is φ = 61141080.

The previous prime is 61157249. The next prime is 61157287. The reversal of 61157267 is 76275116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61157267 - 2²² = 56962963 is a prime.

It is a super-2 number, since 2×61157267² = 7480422613818578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61157287) 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, 917 + ... + 11097.

It is an arithmetic number, because the mean of its divisors is an integer number (15293364).

Almost surely, 2^61157267 is an apocalyptic number.

61157267 is a deficient number, since it is larger than the sum of its proper divisors (16189).

61157267 is a wasteful number, since it uses less digits than its factorization.

61157267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16188.

The product of its digits is 17640, while the sum is 35.

The square root of 61157267 is about 7820.3111830668. The cubic root of 61157267 is about 393.9877236849.

The spelling of 61157267 in words is "sixty-one million, one hundred fifty-seven thousand, two hundred sixty-seven".