55123086 has 16 divisors (see below), whose sum is σ = 110322000. Its totient is φ = 18361728.

The previous prime is 55123069. The next prime is 55123087. The reversal of 55123086 is 68032155.

It is a super-2 number, since 2×55123086² = 6077109220326792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55123087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11590 + ... + 15638.

It is an arithmetic number, because the mean of its divisors is an integer number (6895125).

Almost surely, 2^55123086 is an apocalyptic number.

55123086 is an abundant number, since it is smaller than the sum of its proper divisors (55198914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55123086 is a wasteful number, since it uses less digits than its factorization.

55123086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6323.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 55123086 is about 7424.4923058752. The cubic root of 55123086 is about 380.5787257465.

The spelling of 55123086 in words is "fifty-five million, one hundred twenty-three thousand, eighty-six".