55140461 has 2 divisors, whose sum is σ = 55140462. Its totient is φ = 55140460.

The previous prime is 55140457. The next prime is 55140467. The reversal of 55140461 is 16404155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54671236 + 469225 = 7394^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 55140461 - 2² = 55140457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55140461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55140467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27570230 + 27570231.

It is an arithmetic number, because the mean of its divisors is an integer number (27570231).

Almost surely, 2^55140461 is an apocalyptic number.

It is an amenable number.

55140461 is a deficient number, since it is larger than the sum of its proper divisors (1).

55140461 is an equidigital number, since it uses as much as digits as its factorization.

55140461 is an evil number, because the sum of its binary digits is even.

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

The square root of 55140461 is about 7425.6623273618. The cubic root of 55140461 is about 380.6187081519.

The spelling of 55140461 in words is "fifty-five million, one hundred forty thousand, four hundred sixty-one".