55101861 has 12 divisors (see below), whose sum is σ = 79771692. Its totient is φ = 36651456.

The previous prime is 55101853. The next prime is 55101869. The reversal of 55101861 is 16810155.

It is an interprime number because it is at equal distance from previous prime (55101853) and next prime (55101869).

It can be written as a sum of positive squares in 2 ways, for example, as 22268961 + 32832900 = 4719^2 + 5730^2 .

It is not a de Polignac number, because 55101861 - 2³ = 55101853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55101869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2586 + ... + 10811.

It is an arithmetic number, because the mean of its divisors is an integer number (6647641).

Almost surely, 2^55101861 is an apocalyptic number.

It is an amenable number.

55101861 is a deficient number, since it is larger than the sum of its proper divisors (24669831).

55101861 is a wasteful number, since it uses less digits than its factorization.

55101861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13860 (or 13857 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 55101861 is about 7423.0627775872. The cubic root of 55101861 is about 380.5298725283.

The spelling of 55101861 in words is "fifty-five million, one hundred one thousand, eight hundred sixty-one".