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52913991 = 3133314099
BaseRepresentation
bin1100100111011…
…0011101000111
310200120022100110
43021312131013
5102021221431
65130044103
71211522124
oct311663507
9120508313
1052913991
1127961079
1215879633
13ac68870
14705574b
1549a3346
hex3276747

52913991 has 16 divisors (see below), whose sum is σ = 76227200. Its totient is φ = 32456160.

The previous prime is 52913989. The next prime is 52914079. The reversal of 52913991 is 19931925.

It is not a de Polignac number, because 52913991 - 21 = 52913989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52913191) 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, 10860 + ... + 14958.

It is an arithmetic number, because the mean of its divisors is an integer number (4764200).

Almost surely, 252913991 is an apocalyptic number.

52913991 is a deficient number, since it is larger than the sum of its proper divisors (23313209).

52913991 is a wasteful number, since it uses less digits than its factorization.

52913991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446.

The product of its digits is 21870, while the sum is 39.

The square root of 52913991 is about 7274.2003684254. The cubic root of 52913991 is about 375.4252739743.

The spelling of 52913991 in words is "fifty-two million, nine hundred thirteen thousand, nine hundred ninety-one".

Divisors: 1 3 13 39 331 993 4099 4303 12297 12909 53287 159861 1356769 4070307 17637997 52913991