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55415899 = 7113753367
BaseRepresentation
bin1101001101100…
…1010001011011
310212021102022201
43103121101123
5103141302044
65255431031
71242012250
oct323312133
9125242281
1055415899
112930a870
1216685477
13b633596
147507427
154ce97d4
hex34d945b

55415899 has 32 divisors (see below), whose sum is σ = 72493056. Its totient is φ = 41109120.

The previous prime is 55415881. The next prime is 55415909. The reversal of 55415899 is 99851455.

It is a cyclic number.

It is not a de Polignac number, because 55415899 - 211 = 55413851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55415849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150814 + ... + 151180.

It is an arithmetic number, because the mean of its divisors is an integer number (2265408).

Almost surely, 255415899 is an apocalyptic number.

55415899 is a deficient number, since it is larger than the sum of its proper divisors (17077157).

55415899 is a wasteful number, since it uses less digits than its factorization.

55415899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475.

The product of its digits is 324000, while the sum is 46.

The square root of 55415899 is about 7444.1855833933. The cubic root of 55415899 is about 381.2514121958.

Subtracting 55415899 from its reverse (99851455), we obtain a square (44435556 = 66662).

The spelling of 55415899 in words is "fifty-five million, four hundred fifteen thousand, eight hundred ninety-nine".

Divisors: 1 7 11 37 53 77 259 367 371 407 583 1961 2569 2849 4037 4081 13579 13727 19451 21571 28259 95053 136157 149369 150997 213961 719687 1045583 1497727 5037809 7916557 55415899