55213051 has 2 divisors, whose sum is σ = 55213052. Its totient is φ = 55213050.

The previous prime is 55213049. The next prime is 55213091. The reversal of 55213051 is 15031255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55213051 - 2¹ = 55213049 is a prime.

Together with 55213049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55213091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27606525 + 27606526.

It is an arithmetic number, because the mean of its divisors is an integer number (27606526).

Almost surely, 2^55213051 is an apocalyptic number.

55213051 is a deficient number, since it is larger than the sum of its proper divisors (1).

55213051 is an equidigital number, since it uses as much as digits as its factorization.

55213051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55213051 is about 7430.5484992698. The cubic root of 55213051 is about 380.7856575282.

The spelling of 55213051 in words is "fifty-five million, two hundred thirteen thousand, fifty-one".