55240061 has 2 divisors, whose sum is σ = 55240062. Its totient is φ = 55240060.

The previous prime is 55240057. The next prime is 55240091. The reversal of 55240061 is 16004255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 6728836 = 6965^2 + 2594^2 .

It is a cyclic number.

It is not a de Polignac number, because 55240061 - 2² = 55240057 is a prime.

It is a super-3 number, since 3×55240061³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55240091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27620030 + 27620031.

It is an arithmetic number, because the mean of its divisors is an integer number (27620031).

Almost surely, 2^55240061 is an apocalyptic number.

It is an amenable number.

55240061 is a deficient number, since it is larger than the sum of its proper divisors (1).

55240061 is an equidigital number, since it uses as much as digits as its factorization.

55240061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 55240061 is about 7432.3657740991. The cubic root of 55240061 is about 380.8477403374.

The spelling of 55240061 in words is "fifty-five million, two hundred forty thousand, sixty-one".