61214555 has 4 divisors (see below), whose sum is σ = 73457472. Its totient is φ = 48971640.

The previous prime is 61214521. The next prime is 61214557. The reversal of 61214555 is 55541216.

It is a happy number.

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

It is not a de Polignac number, because 61214555 - 2⁸ = 61214299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61214557) 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, 6121451 + ... + 6121460.

It is an arithmetic number, because the mean of its divisors is an integer number (18364368).

Almost surely, 2^61214555 is an apocalyptic number.

61214555 is a deficient number, since it is larger than the sum of its proper divisors (12242917).

61214555 is a wasteful number, since it uses less digits than its factorization.

61214555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12242916.

The product of its digits is 6000, while the sum is 29.

The square root of 61214555 is about 7823.9730955570. The cubic root of 61214555 is about 394.1107056618.

The spelling of 61214555 in words is "sixty-one million, two hundred fourteen thousand, five hundred fifty-five".