55061919 has 12 divisors (see below), whose sum is σ = 86764392. Its totient is φ = 33370800.

The previous prime is 55061917. The next prime is 55061933. The reversal of 55061919 is 91916055.

It is not a de Polignac number, because 55061919 - 2¹ = 55061917 is a prime.

It is a super-2 number, since 2×55061919² = 6063629847925122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55061917) 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, 277992 + ... + 278189.

It is an arithmetic number, because the mean of its divisors is an integer number (7230366).

Almost surely, 2^55061919 is an apocalyptic number.

55061919 is a deficient number, since it is larger than the sum of its proper divisors (31702473).

55061919 is a wasteful number, since it uses less digits than its factorization.

55061919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556198 (or 556195 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 55061919 is about 7420.3718909499. The cubic root of 55061919 is about 380.4379046838.

The spelling of 55061919 in words is "fifty-five million, sixty-one thousand, nine hundred nineteen".