61542271 has 8 divisors (see below), whose sum is σ = 72049824. Its totient is φ = 51463680.

The previous prime is 61542269. The next prime is 61542277. The reversal of 61542271 is 17224516.

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 61542271 - 2¹ = 61542269 is a prime.

It is a super-2 number, since 2×61542271² = 7574902239674882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61542277) 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, 106930 + ... + 107503.

It is an arithmetic number, because the mean of its divisors is an integer number (9006228).

Almost surely, 2^61542271 is an apocalyptic number.

61542271 is a deficient number, since it is larger than the sum of its proper divisors (10507553).

61542271 is a wasteful number, since it uses less digits than its factorization.

61542271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214481.

The product of its digits is 3360, while the sum is 28.

The square root of 61542271 is about 7844.8882082538. Note that the first 3 decimals coincide. The cubic root of 61542271 is about 394.8127532102.

Adding to 61542271 its reverse (17224516), we get a palindrome (78766787).

The spelling of 61542271 in words is "sixty-one million, five hundred forty-two thousand, two hundred seventy-one".