55774015 has 16 divisors (see below), whose sum is σ = 73283616. Its totient is φ = 40412800.

The previous prime is 55774013. The next prime is 55774021. The reversal of 55774015 is 51047755.

It is a happy number.

It is not a de Polignac number, because 55774015 - 2¹ = 55774013 is a prime.

It is a super-2 number, since 2×55774015² = 6221481498440450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55774013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14385 + ... + 17845.

It is an arithmetic number, because the mean of its divisors is an integer number (4580226).

Almost surely, 2^55774015 is an apocalyptic number.

55774015 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55774015 is a deficient number, since it is larger than the sum of its proper divisors (17509601).

55774015 is a wasteful number, since it uses less digits than its factorization.

55774015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770.

The product of its (nonzero) digits is 24500, while the sum is 34.

The square root of 55774015 is about 7468.2002517340. The cubic root of 55774015 is about 382.0709073164.

It can be divided in two parts, 557740 and 15, that added together give a palindrome (557755).

The spelling of 55774015 in words is "fifty-five million, seven hundred seventy-four thousand, fifteen".