55390546 has 4 divisors (see below), whose sum is σ = 83085822. Its totient is φ = 27695272.

The previous prime is 55390537. The next prime is 55390553. The reversal of 55390546 is 64509355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64509355 = 5 ⋅12901871.

It can be written as a sum of positive squares in only one way, i.e., 54982225 + 408321 = 7415^2 + 639^2 .

It is a super-2 number, since 2×55390546² = 6136225172356232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13847635 + ... + 13847638.

Almost surely, 2^55390546 is an apocalyptic number.

55390546 is a deficient number, since it is larger than the sum of its proper divisors (27695276).

55390546 is a wasteful number, since it uses less digits than its factorization.

55390546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27695275.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 55390546 is about 7442.4825159351. The cubic root of 55390546 is about 381.1932619678.

The spelling of 55390546 in words is "fifty-five million, three hundred ninety thousand, five hundred forty-six".