61852551 has 4 divisors (see below), whose sum is σ = 82470072. Its totient is φ = 41235032.

The previous prime is 61852541. The next prime is 61852577. The reversal of 61852551 is 15525816.

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 61852551 - 2⁶ = 61852487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61852541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10308756 + ... + 10308761.

It is an arithmetic number, because the mean of its divisors is an integer number (20617518).

Almost surely, 2^61852551 is an apocalyptic number.

61852551 is a deficient number, since it is larger than the sum of its proper divisors (20617521).

61852551 is a wasteful number, since it uses less digits than its factorization.

61852551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20617520.

The product of its digits is 12000, while the sum is 33.

The square root of 61852551 is about 7864.6392797127. The cubic root of 61852551 is about 395.4751553750.

The spelling of 61852551 in words is "sixty-one million, eight hundred fifty-two thousand, five hundred fifty-one".