61214018 has 4 divisors (see below), whose sum is σ = 91821030. Its totient is φ = 30607008.

The previous prime is 61214011. The next prime is 61214047. The reversal of 61214018 is 81041216.

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

It can be written as a sum of positive squares in only one way, i.e., 39526369 + 21687649 = 6287^2 + 4657^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61213984 and 61214002.

It is not an unprimeable number, because it can be changed into a prime (61214011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15303503 + ... + 15303506.

Almost surely, 2^61214018 is an apocalyptic number.

61214018 is a deficient number, since it is larger than the sum of its proper divisors (30607012).

61214018 is a wasteful number, since it uses less digits than its factorization.

61214018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30607011.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 61214018 is about 7823.9387778791. The cubic root of 61214018 is about 394.1095532231.

The spelling of 61214018 in words is "sixty-one million, two hundred fourteen thousand, eighteen".