61471155 has 32 divisors (see below), whose sum is σ = 102332160. Its totient is φ = 31472000.

The previous prime is 61471153. The next prime is 61471187. The reversal of 61471155 is 55117416.

It is not a de Polignac number, because 61471155 - 2¹ = 61471153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61471153) 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 31 ways as a sum of consecutive naturals, for example, 108904 + ... + 109466.

It is an arithmetic number, because the mean of its divisors is an integer number (3197880).

Almost surely, 2^61471155 is an apocalyptic number.

61471155 is a deficient number, since it is larger than the sum of its proper divisors (40861005).

61471155 is a wasteful number, since it uses less digits than its factorization.

61471155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its digits is 4200, while the sum is 30.

The square root of 61471155 is about 7840.3542649551. The cubic root of 61471155 is about 394.6606175298.

The spelling of 61471155 in words is "sixty-one million, four hundred seventy-one thousand, one hundred fifty-five".