55212461 has 4 divisors (see below), whose sum is σ = 58118400. Its totient is φ = 52306524.

The previous prime is 55212427. The next prime is 55212463. The reversal of 55212461 is 16421255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55212461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55212461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55212463) 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, 1452941 + ... + 1452978.

It is an arithmetic number, because the mean of its divisors is an integer number (14529600).

Almost surely, 2^55212461 is an apocalyptic number.

It is an amenable number.

55212461 is a deficient number, since it is larger than the sum of its proper divisors (2905939).

55212461 is a wasteful number, since it uses less digits than its factorization.

55212461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905938.

The product of its digits is 2400, while the sum is 26.

The square root of 55212461 is about 7430.5087981914. The cubic root of 55212461 is about 380.7843011802.

The spelling of 55212461 in words is "fifty-five million, two hundred twelve thousand, four hundred sixty-one".