61551527 has 4 divisors (see below), whose sum is σ = 61570896. Its totient is φ = 61532160.

The previous prime is 61551517. The next prime is 61551559. The reversal of 61551527 is 72515516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61551527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61551493 and 61551502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61551517) 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, 3674 + ... + 11687.

It is an arithmetic number, because the mean of its divisors is an integer number (15392724).

Almost surely, 2^61551527 is an apocalyptic number.

61551527 is a deficient number, since it is larger than the sum of its proper divisors (19369).

61551527 is a wasteful number, since it uses less digits than its factorization.

61551527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19368.

The product of its digits is 10500, while the sum is 32.

The square root of 61551527 is about 7845.4781243720. The cubic root of 61551527 is about 394.8325455881.

The spelling of 61551527 in words is "sixty-one million, five hundred fifty-one thousand, five hundred twenty-seven".